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web - EmScripten Merges Its Speedy "Fastcomp" Backend

Posted by artodeto on

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Fastcomp is the name of EmScripten's new LLVM C++ back-end. Fastcomp lives outside of the LLVM tree (along with some other EmScripten-designed LLVM patches) but aims to provide noticeable benefits over its original compiler back-end.

The new Fastcomp compiler core/back-end is more streamlined, tuned around producing ASM.js code, is much faster (around four times faster), uses less system memory, and has other improvements too. The JavaScript generated by Fastcomp is also slated to be better than its original compiler core. The downside to this work though is that this LLVM code is out-of-tree and doesn't work with a stock build of LLVM for right now.
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