Benchmark: Remove all children from DOM element with lastChild2

HTML Preparation code:

<section class="sc mcs_common_module case_empasis color_18 _au_music_content_wrap" data-dss-logarea="xgh">
   <div class="api_subject_bx _sticky_boundary">
      <div data-kgs-sticky="" data-kgs-sticky-target="._sticky" data-kgs-sticky-boundary="._sticky_boundary" data-kgs-sticky-target-active-off="fixed_close" data-kgs-sticky-target-active-on="fixed_open" data-kgs-sticky-target-active-bottom="fixed_footer" data-kgs-sticky-position="fixed" aria-hidden="false" style="background-color: rgb(185, 143, 145); height: 122px;">
         <div class="cm_top_wrap _sticky fixed_open" style="top: 60px;">
            <div class="title_area _title_area">
               <h2 class="title _title_ellipsis" style="max-height:4.9rem;"> <span class="area_text_title type_small"><strong class="_text">This Feeling (Feat. Kelsea Ballerini)</strong></span> <button type="button" class="area_btn_expand _tail" style="display:none;"> <span class="area_inner"> <span class="blind">펴고 접기</span> <span class="this_design_left"></span> <span class="this_design_right"></span> </span> </button> </h2>
               <div class="sub_title"> <span class="txt"> <a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.artist&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;query=The%20Chainsmokers">The Chainsmokers</a> </span> <span class="cm_bar"></span> <span class="" txt"="">2018.12.14.</span> </div>
            </div>
            <div class="api_save_group _keep_wrap">
               <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.keep&amp;r=1&amp;i=00000000_000000F6E826');return false;" href="#" role="button" class="btn_save _keep_trigger" data-url="https://m.search.naver.com/search.naver?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;x_csa=%7B%22theme%22%3A%22music_top%22%2C%20%22pkid%22%3A%22632%22%7D&amp;pkid=632&amp;os=16181286&amp;query=This%20Feeling%20(Feat.%20Kelsea%20Ballerini)"> <i class="spnew ico_save">문서 저장하기</i> </a> 
               <div class="api_ly_save _keep_save_layer"> <a nocr="" href="#" role="button" class="spnew_af item item_save _keep_save" data-cr-on="a=nco_xgh*b.keepon&amp;r=1&amp;i=00000000_000000F6E826" data-cr-off="a=nco_xgh*b.keepoff&amp;r=1&amp;i=00000000_000000F6E826">Keep에 저장</a> <a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.keepmore&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="https://m.keep.naver.com/" class="spnew_af item item_quick">Keep 바로가기</a> </div>
            </div>
            <div class="ly_api_info _keep_login_layer">
               <strong class="tit">저장하기</strong> 
               <p class="dsc">네이버에 로그인 후 문서를 저장하시면<br>Keep에서 확인하실 수 있습니다.</p>
               <a nocr="" href="https://nid.naver.com/nidlogin.login?svctype=262144" data-src-url="https://nid.naver.com/nidlogin.login?svctype=262144" class="link_login" onclick="this.href=jQuery(this).data('src-url')+'&amp;url='+encodeURIComponent(location.href);jQuery(this).attr('crurl', null);return goOtherCR(this, 'a=nco_xgh*b.keeplogin&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));"> <img src="data:image/png;base64,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" width="15" height="15" alt="" class="ico">네이버 로그인</a> <button type="button" class="btn_close _keep_close"><i class="spnew ico_close">정보확인 레이어닫기</i></button> 
            </div>
            <div class="sub_tap_area _gra_tab">
               <div class="type_scroll _scroll_tab">
                  <div>
                     <ul role="tablist" class="tab_list _panel_header_tab">
                        <li class="tab _tab" role="tab" aria-selected="true"> <a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.a&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;x_csa=%7B%22theme%22%3A%22music_top%22%2C%20%22pkid%22%3A%22632%22%7D&amp;pkid=632&amp;os=16181286&amp;query=This%20Feeling%20(Feat.%20Kelsea%20Ballerini)"> <span class="menu">전체</span> </a> </li>
                        <li class="tab _tab" role="tab"> <a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.t&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;x_csa=%7B%22theme%22%3A%22music_top%22%2C%20%22pkid%22%3A%22632%22%7D&amp;pkid=632&amp;os=16181286&amp;query=This%20Feeling%20(Feat.%20Kelsea%20Ballerini)%20%EA%B3%A1%EC%A0%95%EB%B3%B4"> <span class="menu">곡정보</span> </a> </li>
                        <li class="tab _tab" role="tab"> <a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.al&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;x_csa=%7B%22theme%22%3A%22music_top%22%2C%20%22pkid%22%3A%22632%22%7D&amp;pkid=632&amp;os=16181286&amp;query=This%20Feeling%20(Feat.%20Kelsea%20Ballerini)%20%EC%88%98%EB%A1%9D%EC%95%A8%EB%B2%94"> <span class="cm_bar"></span><span class="menu">수록앨범</span> </a> </li>
                        <li class="tab _tab" role="tab"> <a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.p&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;x_csa=%7B%22theme%22%3A%22music_top%22%2C%20%22pkid%22%3A%22632%22%7D&amp;pkid=632&amp;os=16181286&amp;query=This%20Feeling%20(Feat.%20Kelsea%20Ballerini)%20%EA%B4%80%EB%A0%A8%20%ED%94%8C%EB%A0%88%EC%9D%B4%EB%A6%AC%EC%8A%A4%ED%8A%B8"> <span class="cm_bar"></span><span class="menu">관련 플레이리스트</span> </a> </li>
                        <li class="tab _tab" role="tab"> <a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.sa&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;x_csa=%7B%22theme%22%3A%22music_top%22%2C%20%22pkid%22%3A%22632%22%7D&amp;pkid=632&amp;os=16181286&amp;query=This%20Feeling%20(Feat.%20Kelsea%20Ballerini)%20%EB%B9%84%EC%8A%B7%ED%95%9C%20%EC%95%84%ED%8B%B0%EC%8A%A4%ED%8A%B8"> <span class="cm_bar"></span><span class="menu">비슷한 아티스트</span> </a> </li>
                     </ul>
                  </div>
               </div>
               <span class="tab_gra _hint"></span> 
            </div>
            <span class="border"></span> <span class="top_box"></span> 
         </div>
      </div>
      <div class="cm_content_wrap">
         <div class="cm_content_area _cm_content_area_song_info">
            <div class="cm_info_box _sap_list">
               <div class="middle_title">
                  <h3 class="title">곡정보</h3>
                  <a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.at&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;x_csa=%7B%22theme%22%3A%22music_top%22%2C%20%22pkid%22%3A%22632%22%7D&amp;pkid=632&amp;os=16181286&amp;query=This%20Feeling%20(Feat.%20Kelsea%20Ballerini)%20%EA%B3%A1%EC%A0%95%EB%B3%B4" class="more_link"><span class="blind">더보기</span></a> 
               </div>
               <div class="detail_info">
                  <div class="play_wrap _sap_item">
                     <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.atraplay1&amp;r=1&amp;i=00000000_000000F6E826');return false;" href="https://vibe.naver.com/track/21793557" class="thumb_music _sap_trigger" data-audioid="21793557" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/21793557" data-check-type="">
                        <img src="https://search.pstatic.net/common?type=n&amp;size=174x174&amp;quality=95&amp;direct=true&amp;src=https%3A%2F%2Fmusicmeta-phinf.pstatic.net%2Falbum%2F002%2F334%2F2334421.jpg%3Ftype%3Dr204Fll%26v%3D20200828030115" width="87" height="87" alt="앨범 이미지" onerror="this.onerror=null;this.src='data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';this.alt='이미지없음';this.className='bg_nimg';"> 
                        <span class="music_play_ico _music_play_ico">
                           <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                              <g fill="none" fill-rule="evenodd">
                                 <g fill="#4f6a8b">
                                    <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                 </g>
                              </g>
                           </svg>
                           <span class="u_hc _music_play_text">음악재생</span>
                        </span>
                        <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                        <div class="progressbar _progress">
                           <div class="filler"></div>
                           <div class="spinner _spinner"></div>
                           <div class="mask"></div>
                        </div>
                     </a>
                  </div>
                  <div class="text_expand text_center _ellipsis" style="max-height:102px;"> <span class="desc _text"> [Verse 1: Kelsea Ballerini]<br> I'll tell you a story before it tells itself<br> I'll lay out all my reasons, you'll say that I need help...</span> <button onclick="tCR('a=nco_xgh*b.alyrics&amp;r=1&amp;i=00000000_000000F6E826');" type="button" class="story_more _tail" style="">펼쳐보기</button> </div>
               </div>
               <div class="button_area">
                  <div class="button_box">
                     <ul class="type_border">
                        <li>
                           <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.atraplay2&amp;r=1&amp;i=00000000_000000F6E826');return false;" href="https://vibe.naver.com/track/21793557" class="play_button_type _music_play_ico _btn_sap_trigger" data-audioid="21793557" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/21793557" data-check-type="">
                              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                 <g fill="none" fill-rule="evenodd">
                                    <g>
                                       <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13) rotate(90 6.527 8.027)"></path>
                                    </g>
                                 </g>
                              </svg>
                              <span class="text">바로재생</span> 
                           </a>
                        </li>
                     </ul>
                  </div>
                  <div class="button_like _reactionModule" data-sid="MUSIC" data-cid="TRACK_21793557" data-did="NCOMUSIC" data-loaded="1" data-facetype="0" style="visibility: visible;"> <a onclick="return goOtherCR(this,&quot;a=nco_xgh*1&amp;r=1&amp;i=&quot;+urlencode(&quot;00000000_000000F6E826&quot;)+&quot;&amp;u=&quot;+urlencode(this.href));" href="#" class="api_common_like _button off" data-type="like" data-log="like|unlike" aria-pressed="false"> <span class="arr"> <span class="api_spim api_like_ico _icon"></span><em class="u_hc blind _label">좋아요</em><span class="api_spim_af num _count">6,617</span> </span> </a> </div>
                  <div class="button_add"> <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.ashare&amp;r=1&amp;i=00000000_000000F6E826');return false;" href="javascript:;" id="spiButton" class="btn_send naver-splugin spi_sns_share" data-url="https://m.search.naver.com/search.naver?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;x_csa=%7B%22theme%22%3A%22music_top%22%2C%20%22pkid%22%3A%22632%22%7D&amp;pkid=632&amp;os=16181286&amp;query=This%20Feeling%20(Feat.%20Kelsea%20Ballerini)" data-title="thisfeeling" data-cafe-source-type="3" data-cafe-source-title="네이버 통합검색" data-blog-source-type="3" data-blog-source-title="네이버 통합검색" data-blog-blog-id="naver" data-oninitialize="" splugin-id="2507801200">내보내기</a> </div>
               </div>
               <div class="more_wrap" style="margin: 13px -15px -21px;"> <a onclick="return goOtherCR(this,&quot;a=nco_xgh*1&amp;r=1&amp;i=&quot;+urlencode(&quot;00000000_000000F6E826&quot;)+&quot;&amp;u=&quot;+urlencode(this.href));" href="https://vibe.naver.com/search?query=thisfeeling" class="more_multi" role="button"> <span>VIBE에서 더보기</span> <i class="ico_more"></i> </a> </div>
            </div>
         </div>
         <div class="cm_content_area _cm_content_area_album_song">
            <div class="cm_info_box">
               <div class="middle_title">
                  <h3 class="title">같은 앨범 수록곡</h3>
                  <a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.alb&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;x_csa=%7B%22theme%22%3A%22music_top%22%2C%20%22pkid%22%3A%22632%22%7D&amp;pkid=632&amp;os=16181286&amp;query=This%20Feeling%20(Feat.%20Kelsea%20Ballerini)%20%EC%88%98%EB%A1%9D%EC%95%A8%EB%B2%94" class="more_link"><span class="blind">더보기</span></a> 
               </div>
               <div class="play_list_wrap">
                  <ul class="music_play_list _sap_list">
                     <li class="_sap_item">
                        <div class="inner">
                           <div class="number_wrap">
                              <span class="number">1</span> 
                              <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                           </div>
                           <div class="title_wrap"> <span class="badge">TITLE</span> <span class="title"><a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.atrack&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;pkid=632&amp;os=16181286&amp;query=This%20Feeling%20(Feat.%20Kelsea%20Ballerini)">This Feeling (Feat. Kelsea Ballerini)</a></span> </div>
                           <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.aalbplay&amp;r=1&amp;i=00000000_000000F6E826');return false;" class="play_state  _sap_trigger" data-audioid="21793557" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/21793557" data-check-type="">
                              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                 <g fill="none" fill-rule="evenodd">
                                    <g fill="#4f6a8b">
                                       <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                    </g>
                                 </g>
                              </svg>
                              음악재생
                           </a>
                        </div>
                     </li>
                     <li class="_sap_item">
                        <div class="inner">
                           <div class="number_wrap">
                              <span class="number">2</span> 
                              <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                           </div>
                           <div class="title_wrap"> <span class="title"><a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.atrack&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;pkid=632&amp;os=16181224&amp;query=Beach%20House">Beach House</a></span> </div>
                           <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.aalbplay&amp;r=1&amp;i=00000000_000000F6E826');return false;" class="play_state  _sap_trigger" data-audioid="22879008" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/22879008" data-check-type="">
                              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                 <g fill="none" fill-rule="evenodd">
                                    <g fill="#4f6a8b">
                                       <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                    </g>
                                 </g>
                              </svg>
                              음악재생
                           </a>
                        </div>
                     </li>
                     <li class="_sap_item">
                        <div class="inner">
                           <div class="number_wrap">
                              <span class="number">3</span> 
                              <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                           </div>
                           <div class="title_wrap"> <span class="badge">TITLE</span> <span class="title"><a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.atrack&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;pkid=632&amp;os=16181204&amp;query=Hope%20(Feat.%20Winona%20Oak)">Hope (Feat. Winona Oak)</a></span> </div>
                           <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.aalbplay&amp;r=1&amp;i=00000000_000000F6E826');return false;" class="play_state  _sap_trigger" data-audioid="23889116" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/23889116" data-check-type="">
                              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                 <g fill="none" fill-rule="evenodd">
                                    <g fill="#4f6a8b">
                                       <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                    </g>
                                 </g>
                              </svg>
                              음악재생
                           </a>
                        </div>
                     </li>
                     <li class="_sap_item">
                        <div class="inner">
                           <div class="number_wrap">
                              <span class="number">4</span> 
                              <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                           </div>
                           <div class="title_wrap"> <span class="title"><a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.atrack&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;pkid=632&amp;os=16181277&amp;query=Somebody">Somebody</a></span> </div>
                           <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.aalbplay&amp;r=1&amp;i=00000000_000000F6E826');return false;" class="play_state  _sap_trigger" data-audioid="21278334" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/21278334" data-check-type="">
                              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                 <g fill="none" fill-rule="evenodd">
                                    <g fill="#4f6a8b">
                                       <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                    </g>
                                 </g>
                              </svg>
                              음악재생
                           </a>
                        </div>
                     </li>
                     <li class="_sap_item">
                        <div class="inner">
                           <div class="number_wrap">
                              <span class="number">5</span> 
                              <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                           </div>
                           <div class="title_wrap"> <span class="badge">TITLE</span> <span class="title"><a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.atrack&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;pkid=632&amp;os=16181320&amp;query=Side%20Effects%20(Feat.%20Emily%20Warren)">Side Effects (Feat. Emily Warren)</a></span> </div>
                           <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.aalbplay&amp;r=1&amp;i=00000000_000000F6E826');return false;" class="play_state  _sap_trigger" data-audioid="21501850" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/21501850" data-check-type="">
                              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                 <g fill="none" fill-rule="evenodd">
                                    <g fill="#4f6a8b">
                                       <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                    </g>
                                 </g>
                              </svg>
                              음악재생
                           </a>
                        </div>
                     </li>
                     <li class="_sap_item">
                        <div class="inner">
                           <div class="number_wrap">
                              <span class="number">6</span> 
                              <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                           </div>
                           <div class="title_wrap"> <span class="title"><a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.atrack&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;pkid=632&amp;os=16181347&amp;query=Sick%20Boy">Sick Boy</a></span> </div>
                           <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.aalbplay&amp;r=1&amp;i=00000000_000000F6E826');return false;" class="play_state  _sap_trigger" data-audioid="20521521" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/20521521" data-check-type="">
                              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                 <g fill="none" fill-rule="evenodd">
                                    <g fill="#4f6a8b">
                                       <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                    </g>
                                 </g>
                              </svg>
                              음악재생
                           </a>
                        </div>
                     </li>
                     <li class="_sap_item">
                        <div class="inner">
                           <div class="number_wrap">
                              <span class="number">7</span> 
                              <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                           </div>
                           <div class="title_wrap"> <span class="title"><a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.atrack&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;pkid=632&amp;os=16181326&amp;query=Everybody%20Hates%20Me">Everybody Hates Me</a></span> </div>
                           <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.aalbplay&amp;r=1&amp;i=00000000_000000F6E826');return false;" class="play_state  _sap_trigger" data-audioid="21278335" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/21278335" data-check-type="">
                              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                 <g fill="none" fill-rule="evenodd">
                                    <g fill="#4f6a8b">
                                       <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                    </g>
                                 </g>
                              </svg>
                              음악재생
                           </a>
                        </div>
                     </li>
                     <li class="_sap_item">
                        <div class="inner">
                           <div class="number_wrap">
                              <span class="number">8</span> 
                              <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                           </div>
                           <div class="title_wrap"> <span class="title"><a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.atrack&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;pkid=632&amp;os=16181239&amp;query=Siren">Siren</a></span> </div>
                           <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.aalbplay&amp;r=1&amp;i=00000000_000000F6E826');return false;" class="play_state  _sap_trigger" data-audioid="22290604" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/22290604" data-check-type="">
                              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                 <g fill="none" fill-rule="evenodd">
                                    <g fill="#4f6a8b">
                                       <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                    </g>
                                 </g>
                              </svg>
                              음악재생
                           </a>
                        </div>
                     </li>
                     <li class="_sap_item">
                        <div class="inner">
                           <div class="number_wrap">
                              <span class="number">9</span> 
                              <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                           </div>
                           <div class="title_wrap"> <span class="title"><a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.atrack&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;pkid=632&amp;os=16181230&amp;query=You%20Owe%20Me">You Owe Me</a></span> </div>
                           <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.aalbplay&amp;r=1&amp;i=00000000_000000F6E826');return false;" class="play_state  _sap_trigger" data-audioid="21278336" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/21278336" data-check-type="">
                              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                 <g fill="none" fill-rule="evenodd">
                                    <g fill="#4f6a8b">
                                       <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                    </g>
                                 </g>
                              </svg>
                              음악재생
                           </a>
                        </div>
                     </li>
                     <li class="_sap_item">
                        <div class="inner">
                           <div class="number_wrap">
                              <span class="number">10</span> 
                              <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                           </div>
                           <div class="title_wrap"> <span class="title"><a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.atrack&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;mra=bkhH&amp;pkid=632&amp;os=16181206&amp;query=Save%20Yourself">Save Yourself</a></span> </div>
                           <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.aalbplay&amp;r=1&amp;i=00000000_000000F6E826');return false;" class="play_state  _sap_trigger" data-audioid="21612379" data-source="vibe" data-error-redirect-url="https://vibe.naver.com/track/21612379" data-check-type="">
                              <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                 <g fill="none" fill-rule="evenodd">
                                    <g fill="#4f6a8b">
                                       <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                    </g>
                                 </g>
                              </svg>
                              음악재생
                           </a>
                        </div>
                     </li>
                  </ul>
                  <div class="music_player" style="display:none;">
                     <a onclick="return goOtherCR(this,&quot;a=nco_xgh*1&amp;r=1&amp;i=&quot;+urlencode(&quot;00000000_000000F6E826&quot;)+&quot;&amp;u=&quot;+urlencode(this.href));" class="thumb play">
                        <img src="https://musicmeta-phinf.pstatic.net/album/002/334/2334421.jpg?type=r204Fll&amp;v=20200828030115" alt="앨범 이미지"> 
                        <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                        <span class="blind">재생중</span> 
                     </a>
                     <div class="music_now_play">
                        <dl class="music_info">
                           <dt class="u_hc">현재 재생곡</dt>
                           <dd class="title line_1">THAT'S A NO NO</dd>
                           <dt class="u_hc">가수</dt>
                           <dd class="info_txt line_1">ITZY(있지)</dd>
                        </dl>
                        <button class="control_btn"><span class="u_hc">정지</span></button> 
                     </div>
                  </div>
               </div>
               <div class="cm_expand_box"> <button type="button" class="area_button_arrow" data-kgs-collapse="" data-kgs-collapse-target=".play_list_wrap" data-kgs-collapse-target-open="state_open"> <span class="area_inner"><span class="blind">펴고 닫기</span></span> </button> </div>
            </div>
         </div>
         <div class="cm_content_area _cm_content_area_releated_playlist">
            <div class="cm_info_box scroll_img_square_105">
               <div class="middle_title">
                  <h3 class="title">관련 플레이리스트</h3>
                  <a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.apla&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="?where=m&amp;sm=mtb_etc&amp;x_csa=%7B%22theme%22%3A%22music_top%22%2C%20%22pkid%22%3A%22632%22%7D&amp;pkid=632&amp;os=16181286&amp;query=This%20Feeling%20(Feat.%20Kelsea%20Ballerini)%20%EA%B4%80%EB%A0%A8%20%ED%94%8C%EB%A0%88%EC%9D%B4%EB%A6%AC%EC%8A%A4%ED%8A%B8" class="more_link"><span class="blind">더보기</span></a> 
               </div>
               <div class="scroll_box _scrolling_wrapper">
                  <div class="list_info _scroller">
                     <div>
                        <ul class="list">
                           <li>
                              <div class="area_card">
                                 <a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.aplaplay&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="https://vibe.naver.com/playlist/artist_promotion_0184" class="area_link_box">
                                    <div class="thumb">
                                       <img src="https://search.pstatic.net/common?type=n&amp;size=210x210&amp;quality=95&amp;direct=true&amp;src=https%3A%2F%2Fmusic-phinf.pstatic.net%2F20210203_153%2F1612342775914WqG3z_JPEG%2Fdeep.jpg" width="105" height="105" alt="앨범 이미지" onerror="this.onerror=null;this.src='data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';this.alt='이미지없음';this.className='bg_nimg';"> 
                                       <div class="equalizer"> <span class="bar1"></span> <span class="bar2"></span> <span class="bar3"></span> <span class="bar4"></span> </div>
                                    </div>
                                 </a>
                                 <div class="title_box">
                                    <strong class="name type_ell_2"><a nocr="" onclick="return goOtherCR(this, 'a=nco_xgh*b.aplaplay&amp;r=1&amp;i=00000000_000000F6E826&amp;u=' + urlencode(this.href));" href="https://vibe.naver.com/playlist/artist_promotion_0184">the Chainsmokers 내한공연 셋리스트</a></strong> 
                                    <button onclick="gCR('https://vibe.naver.com/playlist/artist_promotion_0184', 'nco_xgh*b.play', '1', '00000000_000000F6E826');" class="play_state">
                                       <svg xmlns="http://www.w3.org/2000/svg" width="12" height="14" viewBox="0 0 12 14">
                                          <g fill="none" fill-rule="evenodd">
                                             <g fill="#4f6a8b">
                                                <path d="M7.629 3.783l2.806 4.474 2.37 3.78c.382.608.199 1.41-.41 1.792-.207.13-.446.198-.69.198H1.35c-.718 0-1.3-.582-1.3-1.3 0-.244.069-.484.199-.69L3.11 7.474l2.316-3.692c.382-.608 1.184-.792 1.792-.41.166.104.306.244.41.41z" transform="translate(-78 -863) translate(9 589) translate(17 259) translate(0 1) translate(52 13)rotate(90 6.527 8.027)"></path>
                                             </g>
                                          </g>
                                       </svg>
                                       음악재생
                                    </button>
                                 </div>
                              </div>
                           </li>
                        </ul>
                     </div>
                  </div>
               </div>
            </div>
         </div>
         <div class="cm_content_area _cm_content_area_other_source">
            <div class="cm_info_box scroll_img_only">
               <div class="middle_title">
                  <h3 class="title">들을수 있는 곳</h3>
               </div>
               <div class="scroll_box">
                  <div class="list_info">
                     <div>
                        <ul class="list">
                           <li>
                              <div class="area_card">
                                 <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.asmart&amp;r=1&amp;i=00000000_000000F6E826');return false;" href="https://vibe.naver.com/track/21793557" class="area_link_box _app_link" data-ios-universal-fullurl="https://vibe.naver.com/ios/universal/albumEnd?albumId=2334421&amp;trackId=21793557" data-ios-scheme="vibe" data-ios-query="albumEnd?albumId=2334421&amp;trackId=21793557" data-ios-fallback-url="https://vibe.naver.com/track/21793557" data-android-package="com.naver.vibe" data-android-scheme="vibe" data-android-query="albumEnd?albumId=2334421&amp;trackId=21793557" data-android-fallback-url="https://vibe.naver.com/track/21793557">
                                    <div class="thumb"> <img src="https://ssl.pstatic.net/sstatic/keypage/outside/scui/cs_common_module/img/img_app_vibe.png" width="87" height="57" alt="출처이미지"> </div>
                                 </a>
                              </div>
                           </li>
                           <li>
                              <div class="area_card">
                                 <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.asmart&amp;r=1&amp;i=00000000_000000F6E826');return false;" href="https://m.bugs.co.kr/track/5394343" class="area_link_box _app_link" data-ios-universal-fullurl="https://music.bugs.co.kr/bugs3/app/trackinfo/5394343" data-ios-scheme="bugs3" data-ios-query="app/trackinfo/5394343" data-ios-fallback-url="https://m.bugs.co.kr/track/5394343" data-android-package="com.neowiz.android.bugs" data-android-scheme="bugs3" data-android-query="app/trackinfo/5394343" data-android-fallback-url="https://m.bugs.co.kr/track/5394343">
                                    <div class="thumb"> <img src="https://ssl.pstatic.net/sstatic/keypage/outside/scui/cs_common_module/img/img_app_bugs.png" width="87" height="57" alt="출처이미지"> </div>
                                 </a>
                              </div>
                           </li>
                        </ul>
                     </div>
                  </div>
               </div>
            </div>
         </div>
      </div>
      <div class="cm_content_area _cm_content_area_other_source">
            <div class="cm_info_box scroll_img_only">
               <div class="middle_title">
                  <h3 class="title">들을수 있는 곳</h3>
               </div>
               <div class="scroll_box">
                  <div class="list_info">
                     <div>
                        <ul class="list">
                           <li>
                              <div class="area_card">
                                 <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.asmart&amp;r=1&amp;i=00000000_000000F6E826');return false;" href="https://vibe.naver.com/track/21793557" class="area_link_box _app_link" data-ios-universal-fullurl="https://vibe.naver.com/ios/universal/albumEnd?albumId=2334421&amp;trackId=21793557" data-ios-scheme="vibe" data-ios-query="albumEnd?albumId=2334421&amp;trackId=21793557" data-ios-fallback-url="https://vibe.naver.com/track/21793557" data-android-package="com.naver.vibe" data-android-scheme="vibe" data-android-query="albumEnd?albumId=2334421&amp;trackId=21793557" data-android-fallback-url="https://vibe.naver.com/track/21793557">
                                    <div class="thumb"> <img src="https://ssl.pstatic.net/sstatic/keypage/outside/scui/cs_common_module/img/img_app_vibe.png" width="87" height="57" alt="출처이미지"> </div>
                                 </a>
                              </div>
                           </li>
                           <li>
                              <div class="area_card">
                                 <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.asmart&amp;r=1&amp;i=00000000_000000F6E826');return false;" href="https://m.bugs.co.kr/track/5394343" class="area_link_box _app_link" data-ios-universal-fullurl="https://music.bugs.co.kr/bugs3/app/trackinfo/5394343" data-ios-scheme="bugs3" data-ios-query="app/trackinfo/5394343" data-ios-fallback-url="https://m.bugs.co.kr/track/5394343" data-android-package="com.neowiz.android.bugs" data-android-scheme="bugs3" data-android-query="app/trackinfo/5394343" data-android-fallback-url="https://m.bugs.co.kr/track/5394343">
                                    <div class="thumb"> <img src="https://ssl.pstatic.net/sstatic/keypage/outside/scui/cs_common_module/img/img_app_bugs.png" width="87" height="57" alt="출처이미지"> </div>
                                 </a>
                              </div>
                           </li>
                        </ul>
                     </div>
                  </div>
               </div>
            </div>
         </div>
      </div>
      
   </div>
</section>

Script Preparation code:

var a =         `<div class="cm_content_area _cm_content_area_other_source">
            <div class="cm_info_box scroll_img_only">
               <div class="middle_title">
                  <h3 class="title">들을수 있는 곳</h3>
               </div>
               <div class="scroll_box">
                  <div class="list_info">
                     <div>
                        <ul class="list">
                           <li>
                              <div class="area_card">
                                 <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.asmart&amp;r=1&amp;i=00000000_000000F6E826');return false;" href="https://vibe.naver.com/track/21793557" class="area_link_box _app_link" data-ios-universal-fullurl="https://vibe.naver.com/ios/universal/albumEnd?albumId=2334421&amp;trackId=21793557" data-ios-scheme="vibe" data-ios-query="albumEnd?albumId=2334421&amp;trackId=21793557" data-ios-fallback-url="https://vibe.naver.com/track/21793557" data-android-package="com.naver.vibe" data-android-scheme="vibe" data-android-query="albumEnd?albumId=2334421&amp;trackId=21793557" data-android-fallback-url="https://vibe.naver.com/track/21793557">
                                    <div class="thumb"> <img src="https://ssl.pstatic.net/sstatic/keypage/outside/scui/cs_common_module/img/img_app_vibe.png" width="87" height="57" alt="출처이미지"> </div>
                                 </a>
                              </div>
                           </li>
                           <li>
                              <div class="area_card">
                                 <a nocr="" onclick="goOtherTCR(this, 'a=nco_xgh*b.asmart&amp;r=1&amp;i=00000000_000000F6E826');return false;" href="https://m.bugs.co.kr/track/5394343" class="area_link_box _app_link" data-ios-universal-fullurl="https://music.bugs.co.kr/bugs3/app/trackinfo/5394343" data-ios-scheme="bugs3" data-ios-query="app/trackinfo/5394343" data-ios-fallback-url="https://m.bugs.co.kr/track/5394343" data-android-package="com.neowiz.android.bugs" data-android-scheme="bugs3" data-android-query="app/trackinfo/5394343" data-android-fallback-url="https://m.bugs.co.kr/track/5394343">
                                    <div class="thumb"> <img src="https://ssl.pstatic.net/sstatic/keypage/outside/scui/cs_common_module/img/img_app_bugs.png" width="87" height="57" alt="출처이미지"> </div>
                                 </a>
                              </div>
                           </li>
                        </ul>
                     </div>
                  </div>
               </div>
            </div>
         </div>
      </div>`;

var aa = [];
for(var i=0; i > 100; i++){
  aa.push(a);
}

var  cm_content_wrap = document.querySelector(".cm_content_wrap");
cm_content_wrap.innerHTML = aa.join("");

Tests:

Remove firstChild
let list = document.querySelector(".cm_content_wrap"); while (list.firstChild) { list.removeChild(list.firstChild); }
Remove lastChild
let list = document.querySelector(".cm_content_wrap"); var last; while (last = list.lastChild) list.removeChild(last);
innerHTML
document.querySelector(".cm_content_wrap").innerHTML = "";
innerText
document.querySelector(".cm_content_wrap").innerText = "";
textContent
document.querySelector(".cm_content_wrap").textContent = "";
firstChild.remove
let list = document.querySelector(".cm_content_wrap"); while (list.firstChild) { list.firstChild.remove() }
range
var range = new Range(); range.selectNodeContents(document.querySelector(".cm_content_wrap")); range.deleteContents();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Remove firstChild
Remove lastChild
innerHTML
innerText
textContent
firstChild.remove
range

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36

Browser/OS: Chrome 88 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Remove firstChild	1361484.0 Ops/sec
Remove lastChild	1341430.5 Ops/sec
innerHTML	1165868.6 Ops/sec
innerText	1137304.5 Ops/sec
textContent	1212209.4 Ops/sec
firstChild.remove	1274874.4 Ops/sec
range	541495.1 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):

LLMs can make mistakes. Check important info.

Related benchmarks:

Remove all children from DOM element with lastChild2 (version: 0)

Comparing performance of: Remove firstChild vs Remove lastChild vs innerHTML vs innerText vs textContent vs firstChild.remove vs range

Created: 3 years ago by: Guest

Jump to the latest result

Remove firstChild

Remove lastChild

innerHTML

innerText

textContent

firstChild.remove

range

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):