Run results for: ReplaceAll (regular expression, native API, split and join)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:93.0) Gecko/20100101 Firefox/93.0

Browser: Firefox 93

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
replace with regular expression	325466.1 Ops/sec
replaceAll	616373.1 Ops/sec
split and join	376380.6 Ops/sec

Script Preparation code:

str = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."

Tests:

replace with regular expression
replaced = str.replace(/\ /g, "+");
replaceAll
replaced = str.replaceAll(" ", "+");
split and join
replaced = str.split(" ").join("+");

Run results for: ReplaceAll (regular expression, native API, split and join)

replace with regular expression

replaceAll

split and join