Run results for: leftPad vs nativeLeftPad

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

nativeLeftPad

10.8M/s

leftPad

8.9M/s

View exact numbers

Test name	Executions per second
✓ nativeLeftPad	10,811,108 Ops/sec
leftPad	8,941,133 Ops/sec

Tests:

nativeLeftPad
function nativeLeftPad(string, len, ch) { return string.padStart(len, ch); } nativeLeftPad('abcdefg', 10, '0')
leftPad
function leftPad(str, len, ch) { let new_str = `${ch.repeat(len)}${str}`; return new_str.slice(-len); } leftPad('abcdefg', 10, '0')