Run results for: Check first and last char charAt startsWith slice regex.test - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
index	9205743.0 Ops/sec
charAt	9420998.0 Ops/sec
startsWith & endsWith	14483555.0 Ops/sec
slice	13918265.0 Ops/sec
regex test	19152800.0 Ops/sec

Script Preparation code:

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

Tests:

index
pat[0] === "/" && pat[pat.length - 1] === "/"
charAt
pat.charAt(0) === "/" && pat.charAt(pat.length - 1) === "/"
startsWith & endsWith
pat.startsWith("/") && pat.endsWith("/")
slice
pat.slice(0, 1) === "/" && pat.slice(-1) === "/"
regex test
(/^\/.+\/$/).test(pat)