Comments on: Studying Fennec Performance http://blog.mozilla.com/tglek/2009/06/26/studying-fennec-performance/ Just another Blog.mozilla.com weblog Sun, 12 Feb 2012 07:38:09 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Eero Tamminen http://blog.mozilla.com/tglek/2009/06/26/studying-fennec-performance/comment-page-1/#comment-30832 Eero Tamminen Sat, 16 Apr 2011 09:46:06 +0000 http://blog.mozilla.com/tglek/?p=140#comment-30832 > Linux is a crappy platform in this case because it’s running on ARM where oprofile barely does anything and there are no other performance tools for N810 Best thing in optimizing code is understanding what it does. Oprofile can provide whole system bottleneck functions. However, trying to take callgraphs on a slow system like N810 is not really that useful or much fun, so I typically use valgrind / callgrind / kcachegrind on desktop for analyzing how a particular process' code arrives at/uses the bottleneck functions that Oprofile highlighted. As long as the code logic is same on two platforms, this works really fine. Strace and functracer give also interesting information although they don't directly tell about the performance: http://stage.maemo.org/pool/diablo/free/s/strace/ http://stage.maemo.org/pool/diablo/free/f/functracer/ > Linux is a crappy platform in this case because it’s running on ARM where oprofile barely does anything and there are no other performance tools for N810

Best thing in optimizing code is understanding what it does. Oprofile can provide whole system bottleneck functions. However, trying to take callgraphs on a slow system like N810 is not really that useful or much fun, so I typically use valgrind / callgrind / kcachegrind on desktop for analyzing how a particular process’ code arrives at/uses the bottleneck functions that Oprofile highlighted.

As long as the code logic is same on two platforms, this works really fine.

Strace and functracer give also interesting information although they don’t directly tell about the performance:
http://stage.maemo.org/pool/diablo/free/s/strace/
http://stage.maemo.org/pool/diablo/free/f/functracer/

]]> By: Jeetendra http://blog.mozilla.com/tglek/2009/06/26/studying-fennec-performance/comment-page-1/#comment-23454 Jeetendra Fri, 18 Sep 2009 10:16:16 +0000 http://blog.mozilla.com/tglek/?p=140#comment-23454 Hi Tara, I wont to measure the time needed to load a site (Page). Can u help me out? Hi Tara,

I wont to measure the time needed to load a site (Page).
Can u help me out?

]]> By: Curtis Bartley http://blog.mozilla.com/tglek/2009/06/26/studying-fennec-performance/comment-page-1/#comment-22771 Curtis Bartley Sat, 27 Jun 2009 17:49:37 +0000 http://blog.mozilla.com/tglek/?p=140#comment-22771 I've been using source-level instrumentation to get callgraphs out of Firefox. This approach is deficient in all sorts of ways but it does save you the trouble of looking up symbols. For me the real problem is not getting decent data, it's simply being able to visualize the data that I can collect. I’ve been using source-level instrumentation to get callgraphs out of Firefox. This approach is deficient in all sorts of ways but it does save you the trouble of looking up symbols. For me the real problem is not getting decent data, it’s simply being able to visualize the data that I can collect.

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