Run results for: Math.log10() vs .toString().length

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.5

Device Platform: Mobile

Date tested: one year ago

Math.log10(), OR

18K/s

Math.log10(), .floor()

15K/s

.toString().length

4K/s

View exact numbers

Tests:

Math.log10(), .floor()
let num = 5000; let nums = []; for(let i = 1; i <= num; ++i) { nums.push(Math.floor(Math.log10(i))); }
Math.log10(), OR
let num = 5000; let nums = []; for(let i = 1; i <= num; ++i) { nums.push(Math.log10(i) | 0); }
.toString().length
let num = 5000; let nums = []; for(let i = 1; i <= num; ++i) { nums.push(i.toString().length - 1); }