Run results for: Get index with indexOf or with map

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

map

7.3M/s

indexOf

3.4M/s

View exact numbers

Test name	Executions per second
✓ map	7,279,314 Ops/sec
indexOf	3,420,064 Ops/sec

Script Preparation code:

var array = [];
for ( var i=0; i < 300; ++i ) {
  	array.push({ index: i, text: `${i}` });
}
var map = new Map();
array.forEach((item, index) => map.set(item, index));

Tests:

indexOf
const toFindIndex = Math.floor(Math.random() * 300) array.indexOf(array.indexOf((v) => v === v[toFindIndex]));
map
const toFindIndex = Math.floor(Math.random() * 300) map.get(toFindIndex)