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Run results for:
Check first and last char loop charAt startsWith slice regex.test
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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
Test name
Executions per second
index
2450486.2 Ops/sec
charAt
2450998.2 Ops/sec
startsWith & endsWith
2560821.0 Ops/sec
slice
2464589.0 Ops/sec
regex test
52312.4 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); }