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:
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
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new Array()
168.1M/s
[] + fill undefined
65.5M/s
[] + fill zeroes
64.7M/s
[] + fill void
64.5M/s
new Array() zeroed
61.7M/s
[] + length
9.7M/s
New Array pre-allocated then zeroed
2.1M/s
Array.from()
96K/s
Array.from zeroes
84K/s
View exact numbers
Test name Executions per second
✓ new Array() 168,084,496 Ops/sec
[] + fill undefined 65,529,688 Ops/sec
[] + fill zeroes 64,671,828 Ops/sec
[] + fill void 64,461,416 Ops/sec
new Array() zeroed 61,723,544 Ops/sec
[] + length 9,738,759 Ops/sec
New Array pre-allocated then zeroed 2,120,184 Ops/sec
Array.from() 95,744 Ops/sec
Array.from zeroes 83,717 Ops/sec

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