Run results for: Array.includes vs Set.has vas Map.has (string)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Array includes (first)

15.0M/s

Set has (mid)

14.2M/s

Set has (last)

14.1M/s

Map has (mid)

14.1M/s

Map has (last)

14.0M/s

Set has (first)

11.0M/s

Map has (first)

10.9M/s

Array includes (mid)

8.9M/s

Array includes (last)

6.7M/s

View exact numbers

Test name	Executions per second
✓ Array includes (first)	15,018,375 Ops/sec
Set has (mid)	14,200,633 Ops/sec
Set has (last)	14,112,494 Ops/sec
Map has (mid)	14,100,850 Ops/sec
Map has (last)	14,016,691 Ops/sec
Set has (first)	10,967,130 Ops/sec
Map has (first)	10,872,117 Ops/sec
Array includes (mid)	8,886,254 Ops/sec
Array includes (last)	6,651,759 Ops/sec

Script Preparation code:

const add = "0x5F9e5e051Ca77a6117171e068e4d2EEe00f1DDF5"
const len = 10
const arr = Array.apply(null, Array(len)).map(function(x, i) {
    return add + i.toString();
});

var firstElem = arr[0]
var midElem = arr[Math.floor(len/2)]
var lastElem = arr[len-1]
      
var a = arr;
var b = new Set(arr);
var c = new Map(arr.map(function(x) {
    return [x, x]
}));

Tests:

Array includes (first)
return a.includes(firstElem);
Set has (first)
return b.has(firstElem);
Map has (first)
return c.has(firstElem);
Array includes (mid)
return a.includes(midElem);
Set has (mid)
return b.has(midElem);
Map has (mid)
return c.has(midElem);
Array includes (last)
return a.includes(lastElem);
Set has (last)
return b.has(lastElem);
Map has (last)
return c.has(lastElem);