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The $$ Showdown

Please view the page source to see the document structure used in the tests.

Values are in milliseconds (ms). Lower is better.

The existing benchmarks were performed on a MacBook Pro running OS X 10.4.7 with a 1.83ghz Core Duo and 1.5GB of RAM.

See also:

• Speeding up Prototype's $$ selector (Sylvain Zimmer's original post)
• Sylvain's test suite (from which this test page was adapted)
• Faster DOM Queries (The Dean Edwards post that inspired the XPath optimization)
• Joe Hewitt's cssToXPath function (for converting a CSS selector to an XPath expression)