Benchmark: querySelector vs getElementById vs getElementsByClassName vs getElementsByTagName 2

HTML Preparation code:

    <div class="test1">
        <div class="test1">
        <div class="test1"></div>
        <div class="test1"></div>
        <div class="test1">
            <div class="test1">
                <div class="test1"></div>
            </div>
        </div>
        <div class="test1"></div>
        <div class="test1"></div>
        </div>
        <div class="test1">
        <div class="test1"></div>
        <div class="test1">
            <div class="test1">
                <div class="test1"></div>
            </div>
        </div>
        <div class="test1">
            <div class="test1">
                <div class="test1"></div>
            </div>
        </div>
        <div class="test1"></div>
        </div>
        <div class="test1"></div>
        <div class="test1">
        <div class="test1"></div>
        <div class="test1">
            <div class="test1">
                <div class="test1"></div>
            </div>
            <div class="test1"></div>
        </div>
        <div class="test1"></div>
        <div class="test1"></div>
        <div class="test1"></div>
        </div>
        <div class="test1"></div>
        <div class="test1">
        <div class="test1">
            <div class="test1"></div>
            <div class="test1">
                <div class="test1">
                    <div class="test1">
                    <article class="test" id="test"></article>
                    </div>
                    <div class="test1">
                    <div class="test1"></div>
                    </div>
                    <div class="test1"></div>
                </div>
                <div class="test1"></div>
            </div>
        </div>
        <div class="test1"></div>
        <div class="test1"></div>
        </div>
        <div class="test1">
        <div class="test1"></div>
        <div class="test1">
            <div class="test1"></div>
            <div class="test1"></div>
        </div>
        <div class="test1"></div>
        <div class="test1"></div>
        <div class="test1"></div>
        </div>
    </div>

Tests:

getElementById
document.getElementById("test");
querySelector (id)
document.querySelector("#test")
getElementsByClassName
document.getElementsByClassName("test")
querySelector (class)
document.querySelector(".test")
getElementsByTagName
document.getElementsByTagName("article")
querySelector (tag)
document.querySelector("article")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
getElementById
querySelector (id)
getElementsByClassName
querySelector (class)
getElementsByTagName
querySelector (tag)

Fastest: N/A

Slowest: N/A

ⓘ Get performance results from real users on your website with Request Metrics.

Website Performance Monitoring by Request Metrics

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:92.0) Gecko/20100101 Firefox/92.0

Browser/OS: Firefox 92 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
getElementById	3573834.0 Ops/sec
querySelector (id)	1314475.0 Ops/sec
getElementsByClassName	3909238.0 Ops/sec
querySelector (class)	1182266.0 Ops/sec
getElementsByTagName	3962080.0 Ops/sec
querySelector (tag)	1263614.0 Ops/sec

querySelector vs getElementById vs getElementsByClassName vs getElementsByTagName 2 (version: 0)

Comparing performance of: getElementById vs querySelector (id) vs getElementsByClassName vs querySelector (class) vs getElementsByTagName vs querySelector (tag)

Created: 2 years ago by: Guest

Jump to the latest result

getElementById

querySelector (id)

getElementsByClassName

querySelector (class)

getElementsByTagName

querySelector (tag)

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A