Run results for: filter vs. handwired for loop filtering

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
Array_filter_method	5464415.0 Ops/sec
classic_for_loop_filter	3971685.0 Ops/sec

Script Preparation code:

var arr = new Array({ length: 10000 }, () => Math.floor(Math.random() * 1000));

Tests:

Array_filter_method
var isGreaterThan500 = val => val > 500; var filtered = arr.filter(isGreaterThan500)
classic_for_loop_filter
var l = arr.length var filtered = []; for (var i = 0; i < l; i++) { var val = arr[i]; if (val > 500) { filtered.push(val); } }