Benchmark: getCookie string vs regex

Script Preparation code:

function getCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(";");
  for (var i = 0; i < ca.length; i++) {
    var c = ca[i];
    while (c.charAt(0) == " ") c = c.substring(1, c.length);
    if (c.indexOf(nameEQ) == 0) {
      var d = c.substring(nameEQ.length, c.length);
      d = decodeURIComponent(d);
      return d;
    }
  }
  return undefined;
}

function getCookieM(name) {
  name = name + "";
  var re = new RegExp("(^| )" + name + "=([^;]+)", "gmi");
  var m = document.cookie.match(re) || undefined;
  if (!!m) {
    m = m.pop();
    m = m.substring(m.indexOf("=")+1);
    m =  !!m ? decodeURIComponent(m) : m;
  }
   return m;
}

document.cookie = "foo=bar";
document.cookie = "foo=nope;domain=measurethat.net";

Tests:

String
getCookie('foo')
Regex
getCookieM('foo')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String
Regex

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 6 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 YaBrowser/25.8.0.0 Safari/537.36

Browser/OS: Yandex Browser 25 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
String	1672414.4 Ops/sec
Regex	1567903.4 Ops/sec

Related benchmarks:

getCookie string vs regex (version: 0)

Comparing performance of: String vs Regex

Created: one year ago by: Guest

Jump to the latest result

String

Regex

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A