Benchmark: 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

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 (version: 2)

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); }

Rendered benchmark preparation results:

Previous results

Test case name	Result
Array.from(new Array(length), () => new Array(length))
Array.from({length}, () => new Array(length))
for push
for index
Array.from(Array(length), () => new Array(length))
for push set size
for index set size

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Latest run results:

Run details: (Test run date: 18 days ago)

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/OS: Chrome 109 on Windows

Test name	Executions per second
Array.from(new Array(length), () => new Array(length))	160453.8 Ops/sec
Array.from({length}, () => new Array(length))	150472.2 Ops/sec
for push	227218.6 Ops/sec
for index	239894.0 Ops/sec
Array.from(Array(length), () => new Array(length))	161594.3 Ops/sec
for push set size	221498.6 Ops/sec
for index set size	233617.0 Ops/sec