Run results for: indexOf vs regex vs RegExp

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 14

Operating system: iOS 14.8

Device Platform: Mobile

Date tested: 2 years ago

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);