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Run results for:
for of vs Array.reduce vs Array.forEach vs for i for summing and array of integers
Test which looping method has the best performance regarding getting the total sum of an array of integers in Javascript
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<iframe src="https://measurethat.net/Embed?id=507738" 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
for i
128K/s
reduce
22K/s
forEach
17K/s
for of
13K/s
View exact numbers
Test name
Executions per second
✓
for i
128,270 Ops/sec
reduce
22,308 Ops/sec
forEach
17,362 Ops/sec
for of
13,234 Ops/sec
Script Preparation code:
var arr = []; for(var i=0; i < 10000; i++) { arr.push(Math.floor(Math.random() * Math.floor(10000))); }
Tests:
for of
var sum = 0; for (var e of arr) { sum += e; }
forEach
var sum = 0; arr.forEach(e => {sum += e;})
reduce
var sum = arr.reduce((acm, current) => acm + current);
for i
var sum = 0; for (var i = 0; i < arr.length; i++) { sum += arr[i]; }