Run results for: forloop performance test

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36

Browser: Chrome 141

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 10 months ago

for ... of

1.2M/s

for ... entries

470K/s

for ... .length (cached)

436K/s

for ... .length

423K/s

View exact numbers

Script Preparation code:

var arr = [];
const count = 1000;
for(let i = 0; i<count; i++)
{
  arr.push(i);
}

Tests:

for ... .length
let sum = 0; for (let i = 0; i < arr.length; i++){ sum += arr[i]; } if (sum !== 499500) throw 42;
for ... of
let sum = 0; let i = 0; for (let v of arr) { sum += v; ++i; } if (sum !== 499500) throw 42;
for ... .length (cached)
let sum = 0; for (let i = 0, l = arr.length; i < l; ++i){ sum += arr[i]; } if (sum !== 499500) throw 42;
for ... entries
let sum = 0; for (let [i,v] of arr.entries()) { sum += v; } if (sum !== 499500) throw 42;