Run results for: reversed versus ordered (+ cached)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser: Chrome 130

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

ordered cached

2K/s

reversed

2K/s

ordered

808/s

View exact numbers

Script Preparation code:

var array = [];
for (let i = 0 ; i < 10000 ; i++) {
	array.push (Math.random () * 100);
}

Tests:

ordered
let sum = 0; for (let i = 0 ; i < array.length ; i++) sum += array[i];
reversed
let sum = 0; for (let i = array.length - 1 ; i >= 0 ; i--) sum += array[i];
ordered cached
let sum = 0; let length = array.length; for (let i = 0 ; i < length ; i++) sum += array[i];