Run results for: String looping vs split

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 13_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.5 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 13

Operating system: iOS 13.3.1

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
for loop	164474.8 Ops/sec
Array.prototype.reduce.call	455457.0 Ops/sec
Array.prototype.reduce.apply	450797.0 Ops/sec
Array.prototype.forEach	439969.7 Ops/sec
.split.reduce	945691.3 Ops/sec
.split.forEach	893293.3 Ops/sec

Script Preparation code:

var digits = Math.floor(Number.MAX_SAFE_INTEGER * Math.random()).toString() 
	+ Math.floor(Number.MAX_SAFE_INTEGER * Math.random()).toString();

Tests:

for loop
let sum = 0; for (let i = 0; i < digits.length; ++i) { sum += +digits[i]; }
Array.prototype.reduce.call
let sum = 0; sum = Array.prototype.reduce.call(digits, (prev, curr) => prev + +curr, 0);
Array.prototype.reduce.apply
let sum = 0; sum = Array.prototype.reduce.apply(digits, [(prev, curr) => prev + +curr, 0]);
Array.prototype.forEach
let sum = 0; Array.prototype.forEach.apply(digits, [(i) => sum += +i]);
.split.reduce
let sum = 0; sum = digits.split('').reduce((prev, curr) => prev + +curr, 0);
.split.forEach
let sum = 0; digits.split('').forEach((i) => sum += +i);

Run results for: String looping vs split

for loop

Array.prototype.reduce.call

Array.prototype.reduce.apply

Array.prototype.forEach

.split.reduce

.split.forEach