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Run results for:
Array.from(Array(length), () => new Array(length)) vs Array.from(new Array(length), () => new Array(length)) vs Array.from({length}, () => new Array(length)) vs for loop push vs for loop index v2
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<iframe src="https://measurethat.net/Embed?id=521475" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36
Browser:
Chrome 109
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
Array.from(new Array(length), () => new Array(length))
159224.2 Ops/sec
Array.from({length}, () => new Array(length))
149215.8 Ops/sec
for push
228554.8 Ops/sec
for index
241000.6 Ops/sec
Tests:
Array.from(new Array(length), () => new Array(length))
const i = 25; const j = 25; const a = Array.from(new Array(i), () => new Array(j))
Array.from({length}, () => new Array(length))
const i = 25; const j = 25; const a = Array.from({length:i}, () => new Array(j))
for push
const i = 25; const j = 25; const a = [] for (let k = 0; k < i; k++) { a.push(new Array(j)); }
for index
const i = 25; const j = 25; const a = [] for (let k = 0; k < i; k++) { a[k] = new Array(j); }
Array.from(Array(length), () => new Array(length))
const i = 25; const j = 25; const a = Array.from(Array(i), () => new Array(j))
for push set size
const i = 25; const j = 25; const a = [] a.length = i; for (let k = 0; k < i; k++) { a.push(new Array(j)); }
for index set size
const i = 25; const j = 25; const a = [] a.length = i; for (let k = 0; k < i; k++) { a[k] = new Array(j); }