Run results for: for/for len

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6 Safari/605.1.15

Browser: Safari 15

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
for len	2903.9 Ops/sec
for	1137.7 Ops/sec

Script Preparation code:

var array = new Array(10000);
for (let i = 0; i < array.length; i++) {
  array[i] = i;
}

Tests:

for len
let sum = 0; for (let i = 0, len = array.length; i < len; i++) { sum += array[i]; }
for
let sum = 0; for (let i = 0; i < array.length; i++) { sum += array[i]; }