Benchmark: String looping vs split

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);

Rendered benchmark preparation results:

Previous results

Test case name	Result
for loop
Array.prototype.reduce.call
Array.prototype.reduce.apply
Array.prototype.forEach
.split.reduce
.split.forEach

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Related benchmarks:

String looping vs split (version: 0)