[Webkit-unassigned] [Bug 149310] New: Optimize WebAssembly calls

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=149310

            Bug ID: 149310
           Summary: Optimize WebAssembly calls
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sukolsak at gmail.com

Currently, when a WebAssembly function calls another function (JS or WASM), it will type check the return value and coerce it into the expected type. Similarly, when a WebAssembly function is called by another function (JS or WASM), it will type check the arguments and coerce them into the expected types. We can avoid this type checking and type coercion if we know that the caller or the callee is a WebAssembly function, because WebAssembly is statically typed.

We can probably take it further by avoiding boxing and unboxing of values completely when a WebAssembly function calls another WebAssembly function.

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