Run results for: Regex vs split/join

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/13.2 Chrome/83.0.4103.106 Safari/537.36

Browser: Chrome 83

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Regex	31980.6 Ops/sec
Split and Join	125636.9 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';

Run results for: Regex vs split/join

Regex

Split and Join