Bug 149310

Summary: Optimize WebAssembly calls
Product: WebKit Reporter: Sukolsak Sakshuwong <sukolsak>
Component: JavaScriptCoreAssignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Normal CC: fpizlo, ggaren, mark.lam, saam, sukolsak
Priority: P2    
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   

Description Sukolsak Sakshuwong 2015-09-17 15:53:11 PDT
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.
Comment 1 Sukolsak Sakshuwong 2015-09-17 15:56:55 PDT
See also: Geoff's comments https://bugs.webkit.org/show_bug.cgi?id=149033#c6