Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 Edg/114.0.1823.43
Chrome 114
Windows
Desktop
10 months ago
Test name Executions per second
[...Array(n).keys()].map(k => undefined) 133.9 Ops/sec
Array.apply(null, { length: 4 }) 639.0 Ops/sec
Array.from 124.1 Ops/sec
Array(n).fill(undefined) 5054.5 Ops/sec
for loop push 112.0 Ops/sec
Script Preparation code:
Tests:
  • [...Array(n).keys()].map(k => undefined)

  • Array.apply(null, { length: 4 })

  • Array.from

  • Array(n).fill(undefined)

  • for loop push