Run details:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Mobile Safari/537.36
Chrome Mobile 117
Android
Mobile
one year ago
Test name Executions per second
filter().map() 149.8 Ops/sec
flatMap() 26.0 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 : [])