Run results for: set vs array iteration + for each

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
array	25931152.0 Ops/sec
set	20765174.0 Ops/sec
Array for Each	30318246.0 Ops/sec
Set for Each	9787615.0 Ops/sec

Script Preparation code:

var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10].map(Math.random);
var b = new Set([1, 2, 3, 4, 5, 6, 7, 8, 9, 10].map(Math.random))
var c = new Set([1, 2, 3, 4, 5, 6, 7, 8, 9, 10].map(Math.random))
var d = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10].map(Math.random);

Tests:

array
for (const x of a) {}
set
for (const x of b) {}
Array for Each
d.forEach(_ => _)
Set for Each
c.forEach(_ => _)

Run results for: set vs array iteration + for each

array

set

Array for Each

Set for Each