Run results for: Array.some vs for loop

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:141.0) Gecko/20100101 Firefox/141.0

Browser: Firefox 141

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

for

1.7M/s

some

124K/s

View exact numbers

Test name	Executions per second
✓ for	1,702,392 Ops/sec
some	123,753 Ops/sec

Script Preparation code:

var array = new Array(1000).fill('');
array = array.map((tem, idx) => idx)
var result = false;

Tests:

for
for (var i = 0; i < array.length; i++) { if (array[i] === 888) { result = true; break; } }
some
result = array.some(function(i) { return array[i] === 888; });