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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 OPR/108.0.0.0 (Edition developer)

Browser: Opera 108

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

regex test

11K/s

startsWith & endsWith

9K/s

slice

9K/s

charAt

7K/s

index

7K/s

View exact numbers

Test name	Executions per second
✓ regex test	10,983 Ops/sec
startsWith & endsWith	8,976 Ops/sec
slice	8,964 Ops/sec
charAt	6,828 Ops/sec
index	6,656 Ops/sec

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); }