Run results for: map.has vs. array.includes - large array - random Access

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

lookup

2182.8M/s

includes

22K/s

View exact numbers

Test name	Executions per second
✓ lookup	2,182,811,136 Ops/sec
includes	21,757 Ops/sec

Script Preparation code:

var a = [];
var b = new Map()
for(let i = 0; i < 100000; i++){
  a.push(i);
  b.set(i, Math.random());
}

Tests: