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Run results for:
getElementById vs getElementsByClassName vs getElementsByName2
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=499126" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
getElementById
8358.6 Ops/sec
getElementsByClassName
7541.4 Ops/sec
getElementsByClassName[0]
4715.0 Ops/sec
getElementsByName
7979.7 Ops/sec
getElementsByName[0]
4763.4 Ops/sec
Script Preparation code:
let Zoo = document.createElement("div"); for (let i=0;i<1000;i++){ let foo = document.createElement("div"); foo.id= "foo"; foo.classList.add("foo"); foo.name= "foo"; Zoo.appendChild(foo); }
Tests:
getElementById
for (let i=0;i<1000;i++){ let bar1 = document.getElementById("foo"); }
getElementsByClassName
for (let i=0;i<1000;i++){ let bar2 = document.getElementsByClassName("foo"); }
getElementsByClassName[0]
for (let i=0;i<1000;i++){ let bar3 = document.getElementsByClassName("foo")[100]; }
getElementsByName
for (let i=0;i<1000;i++){ let bar4 = document.getElementsByName("foo"); }
getElementsByName[0]
for (let i=0;i<1000;i++){ let bar5 = document.getElementsByName("foo")[100]; }