Mozilla Released Firefox 9, JavaScript Performance Improved

Earlier we have talked about Firefox 8, 8.0.1 & Firefox 9 Beta. Now one of the world's most common and popular web-browser Firefox has its version 9.0.  Based on the Gecko 9.0 rendering engine, Firefox 9.0 brings under the hood changes that improve JavaScript performance by up to 30%. Type inference, a new feature in this release, provides the browser's just-in-time compiler (JIT) with reliable information on variable types. This enables it to generate more efficient code which does away with many of the runtime checks which were previously required because variables in JavaScript are dynamically typed. The algorithm developed by Mozilla's programmers is described in detail in Fast and Precise Hybrid Type Inference for JavaScript. It uses conventional static code analysis as its starting point, but adds in dynamic aspects using "type barriers", at which the JIT compiler checks a variable's current type and modifies the generated code where appropriate.
More details about this update, including a list of bug fixes, can be found in the release notes and on the Firefox 9 for developers page. 

To Download Firefox 9 Click Here



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