for vs foreach vs some vs for..of vs for cached length
Compare loop performance
Date tested:
3 years ago
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0
Test name
Executions per second
for
125156.8 Ops/sec
foreach
986749.8 Ops/sec
some
1077036.0 Ops/sec
for..of
10113.7 Ops/sec
for cached length
289782.5 Ops/sec
Benchmark definition (click to collapse):
Script Preparation code:
var array = new Array(1000);
Tests:
for
for (var i = 0; i < array.length; i++) { array[i]; }
foreach
array.forEach(function(i) { array[i]; });
some
array.some(function(i) { array[i]; });
for..of
for (var i of array) { array[i]; }
for cached length
for (var i = 0, l=array.length; i < l; ++i) { array[i]; }
Open this result on MeasureThat.net