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

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

.toString().length

15K/s

Math.log10(), OR

14K/s

Math.log10(), .floor()

7K/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); }