Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
Feature Requests
FAQ
Register
Log In
Run results for:
map vs. map arrow vs for vs. for in vs. forEach
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=588367" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6.1 Safari/605.1.15
Browser:
Safari 17
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
for
17K/s
map
14K/s
map arrow
14K/s
forEach
8K/s
for in
2K/s
View exact numbers
Test name
Executions per second
✓
for
17,233 Ops/sec
map
13,790 Ops/sec
map arrow
13,652 Ops/sec
forEach
8,076 Ops/sec
for in
2,105 Ops/sec
Script Preparation code:
var a = Array(10000).fill(null).map((a, index) => `foo ${index}`)
Tests:
map
var b = a.map(function(c) { return `${c}+1` ; });
for in
var b = []; for (var i in a) { b.push(`${a[i]}+1`); }
for
var b = []; for (var i = 0; i < a.length; i++) { b.push(`${a[i]}+1`); }
forEach
var b = []; a.forEach(function(c) { b.push(`${c}+1`); });
map arrow
var b = a.map(c => `${c}+1`);