Run results for: Iterate-Set

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/106.0.5249.92 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 106

Operating system: iOS 16.0

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
for of: few items	11137664.0 Ops/sec
for of: many items	319494.9 Ops/sec
convert to array: few items	5177839.5 Ops/sec
convert to array: many items	121939.9 Ops/sec
native iterator: few items	13660684.0 Ops/sec
native iterator: many items	165201.4 Ops/sec
native iterator w/ size: few items	5337161.5 Ops/sec
native iterator w/ size: many items:	339106.3 Ops/sec

Script Preparation code:

var fewItemSet = new Set([1, 2, 3]);
var manyItemSet = new Set(Array.from({ length: 1000 }, (_, i) => i));

Tests:

for of: few items
let result = 0; for (const item of fewItemSet) { result += item; }
for of: many items
let result = 0; for (const item of manyItemSet) { result += item; }
convert to array: few items
let result = 0; const arr = Array.from(fewItemSet); for (let i = arr.length; i--;) { result += arr[i]; }
convert to array: many items
let result = 0; const arr = Array.from(manyItemSet); for (let i = arr.length; i--;) { result += arr[i]; }
native iterator: few items
let result = 0; let val = null; const iter = fewItemSet.values(); while (!(val = iter.next()).done) { result += val.value; }
native iterator: many items
let result = 0; let val = null; const iter = manyItemSet.values(); while (!(val = iter.next()).done) { result += val.value; }
native iterator w/ size: few items
let result = 0; let iter = fewItemSet.values(); for (let i = fewItemSet.size; i--;) { result += iter.next().value; }
native iterator w/ size: many items:
let result = 0; let iter = manyItemSet.values(); for (let i = manyItemSet.size; i--;) { result += iter.next().value; }

Run results for: Iterate-Set

Iterate over a set.

for of: few items

for of: many items

convert to array: few items

convert to array: many items

native iterator: few items

native iterator: many items

native iterator w/ size: few items

native iterator w/ size: many items: