[Webkit-unassigned] [Bug 256703] [iOS] Wasm based WebApp readalong.google.com reproducibly jetsams

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=256703

--- Comment #28 from Justin Michaud <justin_michaud at apple.com> ---
I am leaving some notes from my investigation here:

The current status is 1.6G dirty memory in Safari, 0.9G in Chrome. We need to find 700mb.

I have collected the data with malloc heap breakdown enabled:

```
MallocStackLogging=1 __XPC_MallocStackLogging=1 __XPC_Malloc=1 Malloc=1 DYLD_FAMEWORK_PATH=/Volumes/WebKit/ReleaseVersion/OpenSource/WebKitBuild/Release __XPC_DYLD_FAMEWORK_PATH=/Volumes/WebKit/ReleaseVersion/OpenSource/WebKitBuild/Release /Volumes/WebKit/ReleaseVersion/OpenSource/WebKitBuild/Release/Safari.app/Contents/MacOS/Safari -ExtensionsEnabled NO
```

with the attached patch. I then opened ReadAlong with Instruments’ Allocation tool and looked at the call stacks.

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