Info

Tests the cost of repeatedly declaring a regular expression rather than just declaring it once

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

var txt1 = 'mary is at home';
var txt2 = 'john is at home';
for(var i = 0; i < 100; i++) {
  txt1.match(/mary/);
  txt2.match(/mary/);
}

var txt1 = 'mary is at home';
var txt2 = 'john is at home';
var regex = /mary/;
for(var i = 0; i < 100; i++) {
  txt1.match(regex);
  txt2.match(regex);
}

You can edit these tests or add even more tests to this page by appending /edit to the URL.

Compare results of other browsers

0 comments