Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Chrome 108
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
[...Array(n).keys()].map(k => undefined) 100.6 Ops/sec
Array.apply(null, { length: 4 }) 664.9 Ops/sec
Array.from 84.9 Ops/sec
Array(n).fill(undefined) 4764.2 Ops/sec
for loop push 75.4 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