Run results for: Check first and last char loop charAt startsWith slice regex.test 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:122.0) Gecko/20100101 Firefox/122.0

Browser: Firefox 122

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

charAt

2.6M/s

slice

2.6M/s

index

2.5M/s

startsWith & endsWith

2.4M/s

117K/s

regex test

54K/s

View exact numbers

Script Preparation code:

var pat = "/^http.?:\/\/.+\.com/";
var count = 1000;

Tests:

index
for (var i = 0; i < count; i++) { pat[0] === "/" && pat[pat.length - 1] === "/"; }
charAt
for (var i = 0; i < count; i++) { pat.charAt(0) === "/" && pat.charAt(pat.length - 1) === "/"; }
startsWith & endsWith
for (var i = 0; i < count; i++) { pat.startsWith("/") && pat.endsWith("/"); }
slice
for (var i = 0; i < count; i++) { pat.slice(0, 1) === "/" && pat.slice(-1) === "/"; }
regex test
for (var i = 0; i < count; i++) { (/^\/.+\/$/).test(pat); }
at
for (var i = 0; i < count; i++) { pat.at(0) === "/" && pat.at(-1) === "/"; }