Benchmark: regex vs slice - MeasureThat.net

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);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
regex
slice
while loop
binary search

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/103.0.5060.63 Mobile/15E148 Safari/604.1

Browser/OS: Chrome Mobile iOS 103 on iOS 15.6

View result in a separate tab

Test name	Executions per second
regex	6684805.0 Ops/sec
slice	19436950.0 Ops/sec
while loop	43399540.0 Ops/sec
binary search	41295290.0 Ops/sec

regex vs slice (version: 0)

Comparing performance of: regex vs slice vs while loop vs binary search

Created: 2 years ago by: Registered User

Jump to the latest result

regex

slice

while loop

binary search

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A