A browser speed test is a computer benchmark to measure the performance of the JavaScript engine of a web browser. In general the software is available online, located on a website, where different algorithms are loaded and performed in the browser client. Typical test tasks are rendering and animation, DOM transformations, string operations, mathematical calculations, sorting algorithms , graphic performance tests (psychedelic browsing) and memory instructions. Browser speed tests have been used during browser wars to prove superiority of specific web browsers. The popular Acid3 test is no particular speed test but checks browser conformity to web standards (though it checks whether a general performance goal is met or not).
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Online speed test by Futuremark, mainly using rendering, mathematical and memory operations. Takes approx. 5 minutes for execution and tells results of other browsers with different CPUs. Does not respect operating system.
Test of JavaScript engine using simple algorithms. Displays results of other visitors (best, average, poorest) with same operating system and browser version. Additional statistics page with browser ranking.
The test suite is a component of the WebKit rendering engine by Apple. As WebKit is used by Google Chrome and Safari, these browsers achieve good results with SunSpider. Internet Explorer used to be very slow on this test but from Internet Explorer 9 it has been the fastest.[1][2] The test approx. 2 minutes for execution and does not test rendering performance.
JavaScript test suite by Google, used to optimize Google Chrome web browser. Chrome 15 achieves about two and half times better results than Firefox 8 and Opera 11, and about three times better results than Safari 5 with this benchmark (tested on Windows 7).[3] Does not test rendering performance.
Mozilla test suite based on SunSpider tests. Takes several minutes for execution and displays very detailed information about every single test task.
All browser tests deliver different results depending on the type and structure of testing and the focus of their measurement, though the tendency of results seems always to be the same. JavaScript and JavaScript engine speed in general are not the only criteria to evaluate the speed of a browser. Loading and rendering speed for a specific website via the Internet, memory consumption, hard disk storage consumption, start-up speed and so on should also be considered to rate the performance of a browser but are normally not included in online browser speed tests.
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