Run results for: Regex vs split/join

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.7.1

Device Platform: Mobile

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Split and Join

653K/s

Regex

101K/s

View exact numbers

Test name	Executions per second
✓ Split and Join	652,572 Ops/sec
Regex	100,504 Ops/sec

Script Preparation code:

var str = 'Abcd efghij klmnopqrstuv wxy Abcd efghij klmnopqrstuv wxy Abcd efghij klmnopqrstuv wxyAbcd efghij klmnopqrstuv wxy Abcd efghij klmnopqrstuv wxy Abcd efghij klmnopqrstuv wxy';

Tests:

Regex
str.replace(/./g, "$&Z");
Split and Join
str.split('').join('Z') + 'Z';