Run results for: for vs forEach

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0

Browser: Firefox 57

Operating system: Windows 7

Device Platform: Other

Date tested: 2024 years ago

Test name	Executions per second
for loop	102750.9 Ops/sec
forEach	814683.3 Ops/sec

Script Preparation code:

var testArray = [];

for (var i = 1; i <= 1000; i++) {
   testArray.push(i);
}

Tests:

for loop
for(var i = 0, length = testArray.length; i < length; i += 1) { testArray[i] += 1; }
forEach
testArray.forEach((item) => { item += 1; });