Run results for: finding item in a structure with map as well

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser: Chrome 87

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
includes	2236934.8 Ops/sec
has	2242274.5 Ops/sec
in	2285735.0 Ops/sec
map has	2208535.5 Ops/sec

Script Preparation code:

var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var b = new Set(a)
var c = {1: true, 2: true, 3: true, 4: true, 5: true, 6: true, 7: true, 8: true, 9: true, 10: true}
var d = new Map(Object.entries(c))

Tests:

includes
var rando = parseInt(Math.random() * 10); a.includes(rando);
has
var rando = parseInt(Math.random() * 10); b.has(rando)
in
var rando = parseInt(Math.random() * 10); rando in c;
map has
var rando = parseInt(Math.random() * 10) + ''; d.has(rando)

Run results for: finding item in a structure with map as well

looking things up

includes

has

in

map has