Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.4 Safari/605.1.15
Safari 16
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
filter().map() 198.5 Ops/sec
flatMap() 734.4 Ops/sec
Script Preparation code:
x
 
var arr = [];
var i = 0;
while (i <= 1E5) arr[i] = i++;
Tests:
  • filter().map()

     
    arr.filter(x => x % 3).map(x => x/100)
  • flatMap()

     
    arr.flatMap(x => x % 3 ? x/100 : [])