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Run results for: fill then map (with null/undefined/"") vs array.from

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36
Chrome 119
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
Array.from() only 344792.5 Ops/sec
Array.from().map() 380070.2 Ops/sec
.fill("").map() 2800939.2 Ops/sec
.fill(null).map() 2778600.2 Ops/sec
.fill(undefined).map() 2792707.8 Ops/sec
.fill(true).map() 2847709.8 Ops/sec
Tests:

  • Array.from() only

    AخA
     
    Array.from({ length: 100 }, (_, i) => i+i);

  • Array.from().map()

     
    Array.from({ length: 100 }).map((_, i) => i+i);

  • .fill("").map()

     
    Array(100).fill("").map((_, i) => i+i);

  • .fill(null).map()

     
    Array(100).fill(null).map((_, i) => i+i);

  • .fill(undefined).map()

     
    Array(100).fill(null).map((_, i) => i+i);

  • .fill(true).map()

     
    Array(100).fill(true).map((_, i) => i+i);