Run results for: search exactly one element in array filter vs for loop

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0

Browser: Firefox 52

Operating system: Windows

Device Platform: Other

Date tested: 6 years ago

Test name	Executions per second
filter	1015.5 Ops/sec
for loop	1796.3 Ops/sec

HTML Preparation code:

<h3>test 1</h3><!-- id='t1' -->
<h3>test 2</h3><!-- id='t2' -->
<h3>test 3</h3><!-- id='t3' -->
<h3>test 4</h3><!-- id='t4' -->
<h3>test 5</h3><!-- id='t5' -->
<h3>test 6</h3><!-- id='t6' -->
<h3>test 7</h3><!-- id='t7' -->
<h3>test 8</h3><!-- id='t8' -->
<h3>test 9</h3><!-- id='t9' -->
<h3>test 10</h3><!-- id='t10' -->
<h3>test 11</h3><!-- id='t11' -->
<h3>test 12</h3><!-- id='t12' -->
<h3>test 13</h3><!-- id='t13' -->
<h3>test 14</h3><!-- id='t14' -->
<h3>test 15</h3><!-- id='t15' -->
<h3>test 16</h3><!-- id='t16' -->
<h3>test 17</h3><!-- id='t17' -->
<h3>test 18</h3><!-- id='t18' -->
<h3>test 19</h3><!-- id='t19' -->
<h3>test 20</h3><!-- id='t20' -->
<h3>test 21</h3><!-- id='t21' -->
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<h3>test 23</h3><!-- id='t23' -->
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<h3>test 87</h3><!-- id='t87' -->
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<h3>test 90</h3><!-- id='t90' -->
<h3>test 91</h3><!-- id='t91' -->
<h3>test 92</h3><!-- id='t92' -->
<h3>test 93</h3><!-- id='t93' -->
<h3>test 94</h3><!-- id='t94' -->
<h3>test 95</h3><!-- id='t95' -->
<h3>test 96</h3><!-- id='t96' -->
<h3>test 97</h3><!-- id='t97' -->
<h3>test 98</h3><!-- id='t98' -->
<h3>test 99</h3><!-- id='t99' -->
<h3>test 100</h3><!-- id='t100' -->

Script Preparation code:

var arrComments = []; // Create empty array for the comment nodes

// Create a NodeIterator object with all comment nodes in the <table class="ms-formtable"...>
var nodeIterator = document.createNodeIterator(
    document.body,
    NodeFilter.SHOW_COMMENT,    
    function acceptNode(node) {
		return NodeFilter.FILTER_ACCEPT;
	}, false 
);

// Add all the comment nodes of the nodeIterator to the arrComments array
while(nextNode = nodeIterator.nextNode()){
	arrComments.push(nextNode);
}

Tests:

filter
arrComments.getNodeFilter = function(strID) { var objRegExp = new RegExp("id='" + strID + "'"); var commentNode = arrComments.filter(function(comCurrent){ if(objRegExp.test(comCurrent.textContent) == true) return comCurrent; })[0]; return commentNode; } console.log(arrComments.getNodeFilter('t97')); console.log(arrComments.getNodeFilter('t87')); console.log(arrComments.getNodeFilter('t95')); console.log(arrComments.getNodeFilter('t3')); console.log(arrComments.getNodeFilter('t12'));
for loop
arrComments.getNodeForLoop = function(strID) { var objRegExp = new RegExp("id='" + strID + "'"); for(var i = 0; i < this.length; i++) { var commentNode = this[i]; if(objRegExp.test(commentNode.textContent) == true) return commentNode; }; } console.log(arrComments.getNodeForLoop('t97')); console.log(arrComments.getNodeForLoop('t87')); console.log(arrComments.getNodeForLoop('t95')); console.log(arrComments.getNodeForLoop('t3')); console.log(arrComments.getNodeForLoop('t12'));