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Run results for: flatMap vs map/flat

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3 Safari/605.1.15
Safari 18
Mac OS X 10.15.7
Desktop
one month ago
Test name Executions per second
Test flatMap 529.3 Ops/sec
Test map/flat 110.6 Ops/sec
Script Preparation code:
AخA
 
var arr = new Array(100000).fill(1);
Tests:

  • Test flatMap

     
    arr.flatMap(() => [1, 2]);

  • Test map/flat

     
    arr.map(() => [1, 2]).flat();