Firefox 18.0 Lets Loose IonMonkey Compiler
Written by Michael Larabel in Mozilla on 8 January 2013 at 01:36 AM EST. 27 Comments
Mozilla Firefox 18.0 is now available. The main feature of this open-source web-browser update is the introduction of IonMonkey, a faster JavaScript compiler.

IonMonkey is very fast and yields a significant JavaScript performance speed-up for Firefox over its predecessor, J├ĄgerMonkey. As described in the earlier Phoronix post, Mozilla's IonMonkey JavaScript engine is a Just-In-Time (JIT) compiler that provides a new compiler that is more organized and has explicit data structures of advanced compilers. IonMonkey also lays down work for further optimizations and experimentation. IonMonkey works by translating the JavaScript code into an intermediate representation (IR), running various algorithms on the generated IR for carrying out optimizations, and then translating the optimized IR into machine code for execution.

Beyond shipping IonMonkey, Firefox 18 adds in support for Apple Retina Displays on Mac OS X 10.7+, preliminary support for the WebRTC protocol, better image quality with a new HTML scaling algorithm, performance improvements with tab switching, support for W3C touch events in HTML5, and various bug-fixes.

More details on Mozilla Firefox 18.0 are available from the Mozilla.org release notes.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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