Run results for: Iterate-Set

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:134.0) Gecko/20100101 Firefox/134.0

Browser: Firefox 134

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for of: few items	18900554.0 Ops/sec
for of: many items	119204.1 Ops/sec
convert to array: few items	12867138.0 Ops/sec
convert to array: many items	86492.4 Ops/sec
native iterator: few items	17834576.0 Ops/sec
native iterator: many items	109457.9 Ops/sec
native iterator w/ size: few items	19283226.0 Ops/sec
native iterator w/ size: many items:	108539.9 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; }