Run results for: Regex vs Split and pop

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Split and pop

1.2M/s

Regex

64K/s

View exact numbers

Test name	Executions per second
✓ Split and pop	1,159,890 Ops/sec
Regex	63,897 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 pop
str.split('').pop('Z') + 'Z';