startsWith (v9)

Revision 9 of this benchmark created on

Setup

a = ["test"];
    for (var i = 0; i < 5; i++) {
      a.push("some other stuff");
    }
    s = a.join();

Test runner

Ready to run.

Testing in
TestOps/sec
indexOf
r1 = (s.indexOf("test") == 0);
r2 = (s.indexOf("not there") == 0);
ready
lastIndexOf
r1 = (s.lastIndexOf("test", 0) == 0);
r2 = (s.lastIndexOf("not there", 0) == 0);
ready
substring
r1 = (s.substring(0, "test".length) == "test");
r2 = (s.substring(0, "not there".length) == "not there");
ready
slice
r1 = (s.slice(0, "test".length) == "test");
r2 = (s.slice(0, "not there".length) == "not there");
ready
regex
r1 = (/^test/).test(s);
r2 = (/^not there/).test(s);
ready
startswith
r1 = s.startsWith("test");
r2 = s.startsWith("not there");
ready
lastindexof whole string
r1 = (s.lastIndexOf("test") == 0);
r2 = (s.lastIndexOf("not there") == 0);
ready

Revisions

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