Why is there no script bytecode?

https://news.ycombinator.com/item?id=6165457

by jlebrech • 13 years ago

1 7 13 years ago

news.ycombinator.com

asm.js is the nearest thing to it, but V8 has a internal bytecode and it's a shame it cannot be precompiled and included as a script type.

Piskvorrr2• 13 years ago

Precompiled for what platform? We're kind of past the stage "everything is Wintel x86" nowadays: a lot of JIT compilation derives its power from platform-specific optimizations.

jlebrech2• 13 years ago

I mean an intermediary like java.

another option would be to have a <script arch='arm' src='compile.arm.bytecode' /> and compile for various architectures before hand.

Piskvorrr2• 13 years ago

...times various JS interpreters, times various browsers, and keeping all those in sync? Sounds like a support nightmare combined with several attack vectors ("sure, the precompiled version is the same as the original, and doesn't try any funny stuff with pointers, either").

zamalek• 13 years ago

There is, somewhat, support for this: v8 snapshot. It's very poorly documented (VERY), but I did come across this which might be a good place to start clicking links: http://stackoverflow.com/questions/11109538/node-js-v8-how-t...

jlebrech2• 13 years ago

and asm.js is optimised for those snapshots right?

mraleph2• 13 years ago

V8 snapshot is nothing like bytecode, it a serialized native heap with architecture dependent native code (sic!) embedded into it.

And it still contains all source code for all functions.

mraleph2• 13 years ago

V8 has no internal bytecode.

Why is there no script bytecode?

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