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Run results for:
concat vs push vs spread performance(more data)
Compare the new ES6 spread operator with the traditional concat() method and push
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<iframe src="https://measurethat.net/Embed?id=502095" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
Concat
6.1M/s
Push
3.5M/s
Spread operator
3.4M/s
View exact numbers
Test name
Executions per second
✓
Concat
6,120,654 Ops/sec
Push
3,531,944 Ops/sec
Spread operator
3,383,332 Ops/sec
Tests:
Concat
var a = [ "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7 ]; var b = [ 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2 ]; var c = a.concat(b);
Spread operator
var a = [ "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7 ]; var b = [ 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2 ]; var c = [ ...a, ...b ]
Push
var a = [ "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7, "hello", true, 7 ]; var b = [ 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2 ]; var c = a.push(...b);