Run results for: indexOf vs regex vs RegExp

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 YaBrowser/21.8.0.1716 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 21

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
lowercase, trim, indexof	4873794.0 Ops/sec
trim, lowercase, indexof	5512440.0 Ops/sec
regex	9188939.0 Ops/sec
lowercase, replace, indexof	2577541.0 Ops/sec
RegExp	2284931.0 Ops/sec

Script Preparation code:

var str = "This is a simple test!";
var needle = "simple";
var ri = new RegExp('simple', 'i');

Tests:

lowercase, trim, indexof
var a = str.toLowerCase().trim(); var b = needle.toLowerCase().trim(); var c = a.indexOf(b) > -1;
trim, lowercase, indexof
var a = str.trim().toLowerCase(); var b = needle.trim().toLowerCase(); var c = a.indexOf(b) > -1;
regex
var c = /simple/i.test(str);
lowercase, replace, indexof
var a = str.toLowerCase().replace(" ", ""); var b = needle.toLowerCase().replace(" ", ""); var c = a.indexOf(b) > -1;
RegExp
var c = (new RegExp(needle, 'i')).test(str);

Run results for: indexOf vs regex vs RegExp

lowercase, trim, indexof

trim, lowercase, indexof

regex

lowercase, replace, indexof

RegExp