Run results for: set.has vs. array.includes vs array.indexOf (object values)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 8 days ago

Test name	Executions per second
includes	11592887.0 Ops/sec
lookup	20013960.0 Ops/sec
indexof	11058937.0 Ops/sec

Script Preparation code:

var a = [
  { prop: 'height', },
  { prop: 'width', },
  { prop: 'maxHedight', },
  { prop: 'maxWidth', },
  { prop: 'maxHeight', },
  { prop: 'minWidth', },
  { prop: 'color', },
  { prop: 'bg', },
  { prop: 'backgroundColor', },
  { prop: 'opacity', },
  { prop: 'm', },
  { prop: 'mt', },
  { prop: 'mb', },
  { prop: 'mr', },
  { prop: 'mr', },
  { prop: 'mx', },
  { prop: 'my', },
  { prop: 'p', },
  { prop: 'pt', },
  { prop: 'pb', },
  { prop: 'pr', },
  { prop: 'pl', },
  { prop: 'px', },
  { prop: 'py', },
  { prop: 'border', },
  { prop: 'boxShadow', },
  { prop: 'flex', },
  { prop: 'verticalAlign', },
  { prop: 'textAlign', },
  { prop: 'overflow', },
  { prop: 'display', },
  { prop: 'cursor' },
];
var b = new Set(a)
var x = a[Math.floor(a.length / 2)];

Tests:

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

Run results for: set.has vs. array.includes vs array.indexOf (object values)

includes

lookup

indexof