[Webkit-unassigned] [Bug 218939] New: Consider AoT-compiling small (<64KB?) WebAssembly Modules immediately without interpreting?

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=218939

            Bug ID: 218939
           Summary: Consider AoT-compiling small (<64KB?) WebAssembly
                    Modules immediately without interpreting?
           Product: WebKit
           Version: Safari 14
          Hardware: Macintosh
                OS: macOS 10.15
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebAssembly
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jujjyl at gmail.com

http://clb.confined.space/tgifelse/t_shapes_looped.html runs a small Wasm Module (~6KB) in a setTimeout() loop, performing the same Wasm computation over and over.

Executing it in Firefox and Chrome, they both give consistent performance results immediately from the first iteration onwards.

In Safari however, first iteration takes up ~500msecs as the code is interpreted(?), after which AoT compilation kicks in(?), and the subsequent runs are fast ~10-20msecs.

Would it make sense to skip interpreting small (<64KB?) Wasm Modules at all, but immediately/eagerly AoT-compile them?

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