Run results for: regex vs slice

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1 Safari/605.1.15

Browser: Safari 14

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Script Preparation code:

const s = 'b'.repeat(22) + '0'.repeat(10);

Tests:

regex
const s = 'bbbbbbbbbbbbbbbbbbbbbb0000000000'; const re = new RegExp('0+$'); const res = s.replace('re', '');
slice
const s = 'bbbbbbbbbbbbbbbbbbbbbb0000000000'; const idx = s.indexOf(0); const res = s.slice(0, i);
while loop
const s = 'bbbbbbbbbbbbbbbbbbbbbb0000000000'; let idx = s.length - 1; while (idx > 0) { if (s[idx] === '0') { idx--; } else { break; } } const res = s.slice(0, i + 1);
binary search
const s = 'bbbbbbbbbbbbbbbbbbbbbb0000000000'; let l = 0; let r = s.length - 1; let mid; while (l < r) { mid = (l + r) >> 1; if (s[mid] === '0') { r = mid; } else { l = mid + 1; } } const res = s.slice(0, r);