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In addition to my recent question on server-side profiling of a PHP app, an app can have a ton of javascript, being all AJAXy in content.

This begs the question of cross-platform, cross-browser javascript profiling tools - do they exist, what ones do people use, and what benefits are there for each one?

Much appreciated.

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  • How deep do you want to go? If you want a full trace, you're talking browser-specific, if you're talking about time tests to see how fast something runs, you have options. Commented Nov 30, 2010 at 14:13
  • Full trace - but are there tools that are browser-independent, or at least run on several browsers? Time performance tests are also useful, but the trace is what I'm really after. Commented Nov 30, 2010 at 14:14

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http://testswarm.com/

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perfect, that's a really nice crowd-sourcing model. Thanks!
Is the site still active? I have problems connecting to it
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you may do profiling in firebug, dont know about chrome's console though

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Check out HTML 5 Boilerplate.

It includes a Javascript profiler that works for IE6/7 as well. Watch the video on further explanation on how to do this. There are lots of other neat stuff in there too related to latest web standards/practices.

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If your code is abstracted well, using good cross-browser frameworks and libraries, and avoid using native JavaScript wherever possibile, you should not worry about having tools to help you test across all different browsers.

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I know what you're getting at, but even highly checked NASA code gets re-reviewed, optimised and improved. Javascript performance in browsers has been improved to a level of ridiculousness in terms of speed as people see new bottlenecks and clever things. So profiling and optimising is definitely something worth looking at - I've yet to see a project which didn't have room for improvement.

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