Run results for: regex vs compiled regex vs includes

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:94.0) Gecko/20100101 Firefox/94.0

Browser: Firefox 94

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
includes	80102.9 Ops/sec
regex	79514.0 Ops/sec
compiled regex	24303506.0 Ops/sec
variable regex	75991.2 Ops/sec

Script Preparation code:

// Note that var is used to take advantage of global scope
var text = `{"A lot more stuff than what we have before and by a lot more i don't actually mean that much more but it's still more FetchInputEventCrashTimeout":"Watchdog FetchInputEvent were not being fed for 30000 milliseconds.Crash timeout was set to 30000 milliseconds."}`
var regex = new RegExp('\bWatchdog');
var regexVar = /\bWatchdog/;

Tests:

includes
const result = text.includes("Watchdog"); if (result){ console.log("something"); }
regex
const result = text.match(/\bWatchdog/); if (result){ console.log("something"); }
compiled regex
// Note, the following is included in the preperation code // var regex = new RegExp('\bWatchdog'); const result = regex.test(text) if (result){ console.log("something"); }
variable regex
const result = regexVar.test(text) if (result){ console.log("something"); }

Run results for: regex vs compiled regex vs includes

Compares the difference in performance between regex, compiled regex and includes.

includes

regex

compiled regex

variable regex