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Run results for:
JS loops comparison
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=509491" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:123.0) Gecko/20100101 Firefox/123.0
Browser:
Firefox 123
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
indexed loop (assign)
20K/s
indexed loop (push)
18K/s
.map
14K/s
iterator loop
10K/s
.forEach (push)
10K/s
.forEach (assign)
9K/s
View exact numbers
Test name
Executions per second
✓
indexed loop (assign)
20,044 Ops/sec
indexed loop (push)
18,308 Ops/sec
.map
14,025 Ops/sec
iterator loop
10,393 Ops/sec
.forEach (push)
9,912 Ops/sec
.forEach (assign)
9,392 Ops/sec
Script Preparation code:
var data = [...Array(10000).keys()]
Tests:
.map
const result = data.map(x => x + 1)
iterator loop
const result = []; for (const val of data) { result.push(val + 1); }
indexed loop (assign)
const result = new Array(data.length); for (let i = 0; i < data.length; i++) { result[i] = data[i] + 1; }
.forEach (assign)
const result = new Array(data.length); data.forEach((value, i) => result[i] = value + 1);
indexed loop (push)
const result = []; for (let i = 0; i < data.length; i++) { result.push(data[i] + 1); }
.forEach (push)
const result = []; data.forEach((value, i) => result.push(value + 1));