Run results for: set.has vs. array.includes vs array.indexOf (small set of string values)

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_0_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.0.3

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
includes	18914990.0 Ops/sec
lookup	25481816.0 Ops/sec
indexof	24868136.0 Ops/sec

Script Preparation code:

var a = [
  'height',
  'width',
  'mx',
  'maxHeight',
];
var b = new Set(a)

Tests:

includes
return a.includes('mx')
lookup
return b.has('mx')
indexof
return a.indexOf('mx') >= 0

Run results for: set.has vs. array.includes vs array.indexOf (small set of string values)

includes

lookup

indexof