Run results for: Iterate-Set-many

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/119.0.6045.109 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 119

Operating system: iOS 17.0

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
for of: many items	713378.8 Ops/sec
convert to array: many items	35427.5 Ops/sec
native iterator: many items	200589.3 Ops/sec
native iterator w/ size: many items:	687715.1 Ops/sec

Script Preparation code:

var manyItemSet = new Set(Array.from({ length: 1000 }, (_, i) => i));
var arr = Array.from(manyItemSet);

Tests:

for of: many items
let result = 0; for (const item of manyItemSet) { result += item; }
convert to array: many items
let result = 0; let l = arr.length; for (let i = l; i--;) { result += arr[i]; }
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: many items:
let result = 0; let iter = manyItemSet.values(); for (let i = manyItemSet.size; i--;) { result += iter.next().value; }

Run results for: Iterate-Set-many

Iterate over a set.

for of: many items

convert to array: many items

native iterator: many items

native iterator w/ size: many items: