Run results for: set vs array vs map iteration for,for-of and values with init

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: 2 days ago

Test name	Executions per second
array for-of	1608.3 Ops/sec
set for-of	1618.4 Ops/sec
array for	576.8 Ops/sec
set values for-of	1616.3 Ops/sec
map values for-of	1607.3 Ops/sec
map keys for-of	830.3 Ops/sec
map kv for-of	1563.3 Ops/sec

Script Preparation code:

var a = [];
for (var i = 0; i <= 10000; i++) {
    a.push(i);
}
var b = new Set(a);
var c = new Map(a.map(x => [x, x]));
var res = new Float32Array(a.length);

Tests:

array for-of
let i = 0; for (const x of a) { res[i] = x; i++; }
set for-of
let i = 0; for (const x of b) { res[i] = x; i++; }
array for
for (let i = 0; i < a.length; i++) { res[i] = a[i]; }
set values for-of
const v = b.values(); let i = 0; for (const x of v) { res[i] = x; i++; }
map values for-of
const v = c.values(); let i = 0; for (const x of v) { res[i] = x; i++; }
map keys for-of
const v = c.keys(); let i = 0; for (const x of v) { res[i] = c.get(v); i++; }
map kv for-of
let i = 0; for (const [x, y] of c) { res[i] = y; i++; }

Run results for: set vs array vs map iteration for,for-of and values with init

array for-of

set for-of

array for

set values for-of

map values for-of

map keys for-of

map kv for-of