'IE9 vs Chrome 10 vs Firefox 4 RC vs Opera 11.01 vs Safari 5 - The BIG browser benchmark!'. ^ Adrian Kingsley-Hughes (March 15, 2011).Internet Explorer 9 Platform Demos: Test Drive. ^ 'WebKit Sunspider JavaScript Benchmark Results'.'HTML5, Hardware Accelerated: First IE9 Platform Preview Available for Developers'. ^ Hachamovitch, Dean (March 18, 2010).

^ a b Hachamovitch, Dean (November 23, 2009).

In 2012, subsequent versions of Chakra, such as the version included in Internet Explorer 10, introduced additional performance changes, including JIT compilation on 圆4 and ARM architectures, and optimizations related to floating point math and garbage collection. March 2011 performance tests for ZDNet concluded that Internet Explorer 9 (32-bit), Chrome 10, and Firefox 4 release candidate were 'pretty evenly matched.'

On March 8, 2011, Microsoft published results showing the 32-bit Internet Explorer 9 to be faster than Safari, Firefox (with TraceMonkey), Chrome, and Opera. The same test performed on Mashowed the first IE9 Platform Preview (using the then-current version of Chakra) to be faster than Firefox (with SpiderMonkey), but slower than Safari (with SquirrelFish Extreme), Chrome (with V8), and Opera (with Carakan). SunSpider tests performed on Novemshowed the PDC version of IE9 executing scripts much faster than IE8, but slower than Firefox 3.6, Chrome 4, and WebKit Nightly. Though Microsoft has in the past pointed out that other elements, such as rendering and marshalling, are just as important for a browser's overall performance, their improvements to the engine were in response to evolving competing browsers, compared to which IE8 was lagging behind in terms of client-side script processing speed. Microsoft Edge switched to the V8 JavaScript engine in 2020.Ī distinctive feature of the engine is that it JIT compiles scripts on a separate CPU core, parallel to the web browser. Microsoft later developed a new JavaScript engine for its Microsoft Edge browser, which is confusingly also called Chakra. It is used in the Internet Explorer web browser. Chakra Developer(s)Ĭhakra is a proprietary JScript engine developed by Microsoft. For other uses, see Chakra (disambiguation). For the engine of Microsoft Edge Legacy, see Chakra (JavaScript engine). This article is about the engine of Internet Explorer.

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