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Run results for:
Medium-size Array concat vs spread operator vs push
Compare the new ES6 spread operator with the traditional concat() method and push
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<iframe src="https://measurethat.net/Embed?id=616005" 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/141.0.0.0 Safari/537.36
Browser:
Chrome 141
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
8 months ago
Test name
Executions per second
Array.prototype.concat
93343.0 Ops/sec
spread operator
72002.8 Ops/sec
Push
81512.7 Ops/sec
Tests:
Array.prototype.concat
let a = (new Array(1e3)).fill(99); let b = (new Array(1e3)).fill(99); let c = (new Array(1e3)).fill(99); let d = (new Array(1e3)).fill(99); const combined = a.concat(b).concat(c).concat(d)
spread operator
let a = (new Array(1e3)).fill(99); let b = (new Array(1e3)).fill(99); let c = (new Array(1e3)).fill(99); let d = (new Array(1e3)).fill(99); const combined = [...a, ...b, ...c, ...d];
Push
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].push(...params); let a = (new Array(1e3)).fill(99); let b = (new Array(1e3)).fill(99); let c = (new Array(1e3)).fill(99); let d = (new Array(1e3)).fill(99); const combined = []; combined.push(...a); combined.push(...b); combined.push(...c); combined.push(...d);