Run results for: Define Regex inline vs not inline...

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

Browser: Chrome 71

Operating system: Mac OS X 10.14.0

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
define in function	101.8 Ops/sec
define outside	229.1 Ops/sec

Tests:

define in function
const run_one_regex = (text) => { ONE_REGEX = /^(?!.* $\s)[\w *()[\]'"/.&–-]+$/gm return ONE_REGEX.test(text); } const text = 'blarb'; for(let i = 0; i < 20000; i++) { run_one_regex(text); }
define outside
ONE_REGEX = /^(?!.* $\s)[\w *()[\]'"/.&–-]+$/gm const run_one_regex = (text) => { return ONE_REGEX.test(text); } const text = 'blarb'; for(let i = 0; i < 20000; i++) { run_one_regex(text); }