Run results for: for loop array caching with mutations II

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36

Browser: Chrome 87

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
mutate without length caching	189.0 Ops/sec
mutate with length caching	270.7 Ops/sec
separate array without length caching	254.4 Ops/sec
separate array with length caching	495.7 Ops/sec

Script Preparation code:

var arr = Array.from({length: 10000}, (_, i) => i);

Tests:

mutate without length caching
for (let i = 0; i < arr.length; i++) { arr[i] = arr[i] % 7; }
mutate with length caching
for (let i = 0, l = arr.length; i < l; i++) { arr[i] = arr[i] % 7; }
separate array without length caching
const arr1 = []; for (let i = 0; i < arr.length; i++) { arr1[i] = arr[i] % 7; } arr = arr1;
separate array with length caching
const arr1 = []; for (let i = 0, l = arr.length; i < l; i++) { arr1[i] = arr[i] % 7; } arr = arr1;