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What's the difference between asm.js and WebAssembly? "The initial implementation of WebAssembly support in browsers will be based on asm.js and PNaCl". PNaCl?

by castell 11y ago

What's the difference between asm.js and WebAssembly? "The initial implementation of WebAssembly support in browsers will be based on asm.js and PNaCl". PNaCl? https://en.wikipedia.org/wiki/WebAssembly https://en.wikipedia.org/wiki/WebAssembly , https://en.wikipedia.org/wiki/Asm.js https://en.wikipedia.org/wiki/Asm.js So is WebAssembly mere an asm.js v2 where all browser vendors agreed on a standard?

lmm 11y ago
No, it's a (LLVM-based) bytecode representation. http://nativeclient.googlecode.com/svn/data/site/pnacl.pdf http://nativeclient.googlecode.com/svn/data/site/pnacl.pdf
- kevingadd 11y ago
  WebAssembly doesn't actually have anything to do with LLVM. There's a LLVM backend that can generate it, but that's no different from how emscripten acts as a LLVM -> asm.js pipeline.
  - lmm 11y ago
    PNaCL is based on LLVM - if WebAssembly doesn't use that technology then what's the connection to PNaCL?
    - azakai 11y ago
      A lot of useful information from PNaCl has informed WebAssembly, and a bunch of the same developers are involved.
antome 11y ago
More specifically, asm.js can be seen as WebAssembly alpha, and will exist as a shiv until most browsers can run WebAssembly. Both WebAssembly and asm.js can be compiled through emscripten.
- deleted 11y ago
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