Mozilla’s New JavaScript Engine, JägerMonkey, Makes Firefox Four Times Faster!

As announced earlier, Mozilla developers are working on a new JavaScript optimizer for Firefox based browsers. This new JIT compiler, JägerMonkey, is now available for the testing and will be integrated to Firefox soon to replace the current optimizer, TraceMonkey.

According to Mozilla, the JägerMonkey will enhance JavaScript rendering performance for Firefox. This project uses the same assembler as the Apple’s WebKit/Safari, Nitro JIT. Hence, Mozilla is following a hybrid path to take advantage of both: TraceMonkey and Nitro.

Speed Test

Mozilla developers have created a website, Are We Fast Yet?, which monitors speed optimization in Firefox against the other standards like Google’s V8. According to the tests, JägerMonkey makes Firefox 4x faster (on V8-v5 benchmark). The JägerMonkey will be introduced in Firefox 4 Beta 6, and it is already available in the JS Engine Preview build.

Mozilla’s David Anderson describes JägerMonkey as:

Hybrid approach (of JägerMonkey) is designed to use well-established optimization techniques that work everywhere, and combine them with our existing hyper-optimizing engine that handles smaller subsets of code.

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