array construction comparison extended (version: 1)

Comparing performance of: new Array() vs Array.from() vs [] + length vs [] + fill undefined vs [] + fill void vs new Array() zeroed vs Array.from zeroes vs [] + fill zeroes vs New Array pre-allocated then zeroed

Created: one year ago by: Registered User
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Tests:

  • new Array()

  • Array.from()

  • [] + length

  • [] + fill undefined

  • [] + fill void

  • new Array() zeroed

  • Array.from zeroes

  • [] + fill zeroes

  • New Array pre-allocated then zeroed

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results
  • Test case name Result
    new Array()
    Array.from()
    [] + length
    [] + fill undefined
    [] + fill void
    new Array() zeroed
    Array.from zeroes
    [] + fill zeroes
    New Array pre-allocated then zeroed

    Fastest: N/A

    Slowest: N/A

Latest run results:
Run details: (Test run date: one year ago)
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36
Chrome 135 on Mac OS X 10.15.7
View result in a separate tab
Test name Executions per second
new Array() 168084496.0 Ops/sec
Array.from() 95744.2 Ops/sec
[] + length 9738759.0 Ops/sec
[] + fill undefined 65529688.0 Ops/sec
[] + fill void 64461416.0 Ops/sec
new Array() zeroed 61723544.0 Ops/sec
Array.from zeroes 83717.4 Ops/sec
[] + fill zeroes 64671828.0 Ops/sec
New Array pre-allocated then zeroed 2120184.5 Ops/sec
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