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That still counts as performing poorly when measured against other browsers. It could be Firefox's Javascript engine that is too slow: As a developer, I want to have applications that run fast and look good; I don't care how the browser achieves that much. At the moment, Firefox just doesn't do that for me.
I'm using an Intel Core 2 CPU at 2.40GHz, 2GB RAM and an NVidia GeForce 7300GT. I use the latest betas of Chrome, Opera, Safari, Internet Explorer, and Firefox available precompiled for download (not directly from their repositories). My OS is the latest Windows 7 with all recent updates.
Actually, Internet Explorer 9 has a similarly poor performance, as you can see from my measurements. Opera seems to be winning so far, and by a wide margin.
Interestingly, Firefox compares poorly to other browsers when it comes to heavy rendering in "canvas". Here's a demo I made that allows measuring the speed of rendering in FPS (frames per second).
http://dionyziz.kamibu.com/3d/heli/
Chrome 6: 31 FPS Opera 10.60: 46 FPS Safari 5.0: 25 FPS; visually poor results Internet Explorer 9: 19 FPS Firefox 4.0 Beta 1: 19 FPS
Although in practice most of the time advanced data structures and algorithms are not used, it is useful to study them and implement them yourself at least once. Dijkstra's algorithm, Prim's, Kruskal's, maximum flow, and other basic graph-operating algorithms are a good example.
