Benchmark: Map.get vs array.indexOf

HTML Preparation code:

<!--your preparation HTML code goes here-->

Tests:

Map
const order = ['a', 'b', 'c'] const orderMap = new Map(order.map((letter, index) => [letter, index])) const data = ['b', 'c', 'a', 'd'] data.sort((a, b) => (orderMap.get(a) ?? Infinity - orderMap.get(b) ?? Infinity))
indexOf
const order = ['a', 'b', 'c'] const data = ['b', 'c', 'a', 'd'] data.sort((a, b) => { const indexA = order?.indexOf(a) const indexB = order?.indexOf(b) if (indexA !== -1 && indexB !== -1) return indexA - indexB if (indexA === -1 && indexB !== -1) return 1 if (indexA !== -1 && indexB === -1) return -1 return 0 })

Rendered benchmark preparation results:

Previous results

Test case name	Result
Map
indexOf

Latest run results:

Run details: (Test run date: 26 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0

Browser/OS: Firefox 152 on Windows

indexOf

1.2M/s

Map

1.1M/s

View exact numbers

Test name	Executions per second
✓ indexOf	1,182,777 Ops/sec
Map	1,134,638 Ops/sec

Map.get vs array.indexOf (version: 1)