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Run results for:
map vs. for vs. for in vs. forEach
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=570942" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0
Browser:
Firefox 133
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
for
78.8M/s
forEach
41.8M/s
map
38.6M/s
for in
4.2M/s
View exact numbers
Test name
Executions per second
✓
for
78,846,720 Ops/sec
forEach
41,818,144 Ops/sec
map
38,556,696 Ops/sec
for in
4,239,862 Ops/sec
Script Preparation code:
var a = ["foo", "bar", "baz", "boom"]
Tests:
map
var b = a.map(function(c) { return c; });
for in
var b = []; for (var i in a) { b.push(a[i]); }
for
var b = []; for (var i = 0; i < a.length; i++) { b.push(a[i]); }
forEach
var b = []; a.forEach(function(c) { b.push(c); });