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Browser Speed Comparisons
kfrench writes "Internet browser speed tests for 'cold starts', 'warm starts', rendering CSS, rendering tables, script execution, displaying multiple images and 'history'. 'Opera seems to be the fastest browser for Windows. Firefox is not faster than Internet Explorer, except for scripting, but for standards support, security and features, it is a better choice.'"
What is the point of this? I thought browser speed just didnt matter anymore, at least it doesnt to me. Does anyone even notice rendering anymore? I dont use a computer slow enough, nor have internet fast enough (only a T1) to notice any damn difference. This might have been interesting in the ancient slow days but anymore? come on?
And just how do you test a cold boot of IE? reboot the computer? And if your not using windows why would you ever shut off your browser?
There are a bunch of things I'd have done differently when doing a report like this.
The most important one is trying to measure something as close as possible to the Web browsing experience. That means loading pages over a network (at 56K, DSL, Cable, and/or T1 speeds, with some latency) rather than from local files, and loading pages that look more like a random sampling of Web pages rather than constructed examples (e.g., a page with tons of absolutely positioned elements). When the author of the test constructs examples like those used here for the "Rendering CSS", "Rendering Table", "Script speed", and "Multiple Images" benchmarks, the results will have a bias (relative to average performance browsing the Web) towards one browser or another. I'm not saying the author of the tests chose to bias it in a certain direction; merely that constructed tests like this will always have some bias. When such tests become widely used by the press (as iBench has), it even leads browser makers to optimize for the tests rather than for what matters for users.
Also, when testing startup times on Linux (especially cold startup), it makes a huge difference whether starting in a KDE (QT-based environment), GNOME (GTK+-based environment), or other environment, since it affects which shared libraries are already in memory. Testing Mozilla's startup times under GNOME (especially if using a GTK2 version of Mozilla under GNOME 2, or a GTK1 version of Mozilla under GNOME 1) would have improved its performance significantly.
Finally, Mozilla 1.8 hasn't been released yet, so I'm a little puzzled how it was tested. The released version will have changes from the current development version, so it will perform differently. It may be a slight difference, but the report should really say exactly what is tested.
Few people (mainly those in libraries/'net cafes, and privacy nuts) use a "clean" browser. Most people will have hundreds, often thousands, of links in their browser history, tens of megabytes in the cache, a big collection of bookmarks, and plugins like Flash and toolbars. In my experience, a browser will be nice and snappy fresh out of the box, but after a few weeks of piling these things on, it may slow significantly, either in its startup time or while browsing. Some browsers may be worse than others in this regard. The author of the linked article has done an outstanding job, but since it appears most of the tests were performed on freshly-installed, "clean" browsers, the results should be considered with caution.