Tests:

Historical Performance Data aggregated from 89 community runs

Desktop Results:
Chrome 66 runs
Array.prototype.slice
108.4M/s
spread operator
75.9M/s

Fastest: Array.prototype.slice (1.4x faster)

View exact numbers
  • Array.prototype.slice: 108,407,800 ops/sec
  • spread operator: 75,874,488 ops/sec
Firefox 23 runs
Array.prototype.slice
49K/s
spread operator
21K/s

Fastest: Array.prototype.slice (2.3x faster)

View exact numbers
  • Array.prototype.slice: 49,086 ops/sec
  • spread operator: 20,936 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results
  • Test case name Result
    Array.prototype.slice
    spread operator

    Fastest: N/A

    Slowest: N/A

Latest run results:
Run details: (Test run date: one month ago)
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:151.0) Gecko/20100101 Firefox/151.0
Firefox 151 on Mac OS X 10.15
View result in a separate tab
Array.prototype.slice
517K/s
spread operator
64K/s
View exact numbers
Test name Executions per second
Array.prototype.slice 516,704 Ops/sec
spread operator 63,803 Ops/sec