Red Tail Hawk atop San Bruno Mountain - Internet O'Clock

08/21/2010

Red Tail Hawk atop San Bruno Mountain

Red Tail Hawk atop San Bruno Mountain, originally uploaded by alexbain.

Aug 21, 2010 2:13:16 PM

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JSPerf.com - [this is good] JSPerf.com is a site designed to aid in benchmarking JavaScript snippets to help determine which solution is the most efficient. The results can kind of eye opening. As an example, I picked a random test that was written to test the speed of various frameworks' selection engines. Results are below: Note that IE7 errored out on two of the tests, making this a little less useful. Note the numbers of operations a second - each lookup is genuinely expensive in IE7. IE8 performs much better here (note the ~56x improvement for frameworks). In addition, look at the speed of querySelectorAll (not supported in IE7). So Fast! Firefox, as expected, performed admirably. It is interesting to note, however, that the native solutions were faster. Safari really blew Firefox out of the water. 3x improvement for frameworks, 11x improvement for native. Chrome placed between Firefox and Safari. Morale of the story: JavaScript performance cannot be trivilialized for older browsers.

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Blue-bead lily (Clintonia borealis) Blue-bead lily (Clintonia borealis), originally uploaded by alexbain.

Alex Bain

Some blend of software engineering, photography, and cognitive science.

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