[Webkit-unassigned] [Bug 146064] New: JSC should natively support WebAssembly

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Jun 17 09:07:29 PDT 2015


            Bug ID: 146064
           Summary: JSC should natively support WebAssembly
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fpizlo at apple.com

WebAssembly (https://github.com/WebAssembly/design) is a new format for native programs on the web. It aims to support everything that asm.js supports, but allows the VM to sidestep the JS parsing and profiling pipeline entirely. This is a good thing for the VM - less work to support native code.

Although WebAssembly will have polyfill to asm.js, we should support it natively by:

- Having a WebAssembly baseline JIT that's used for fast start-up and some basic execution count profiling.
- An LLVM backend that uses the FTL's LLVM glue and compiler plan scheduling for hot code.

This standard has broad support, and we should continue to participate in discussions about how to make it great.


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