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

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu May 18 11:29:17 PDT 2023


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

--- Comment #11 from Justin Michaud <justin_michaud at apple.com> ---
> Interesting: I have done a number of retries by opening via single tab and
> don't see that big a number on chrome. Maybe that's because I am looking at
> the chrome's taskmanager and you might be looking at activitymonitor?

I was looking at your screenshot

> Initially: total memory used via activity monitor: 14.40 GB
> when site opened on first tab on chrome: 15.20 GB - (~800MB growth)
> when same site opened on second tab on chrome: 15.90 GB - (~700 MB growth)
> when site opened on third tab on chrome: 16.6 GB - (700 MB growth)

I misspoke, I meant the total sum of Safari and Chrome processes. Your approach gave some interesting data too though!

> So, on my 3 attempts chrome is reporting a growth of 700-800 MB vs safari
> reporting ~2.6-2.7 GB.

That is pretty interesting, and assuming that there isn't some silly bug in our GPU memory attribution, seems to be pretty indicative of extra memory usage in Safari.

Let me see where that memory is coming from.

> Is it for the compiled wasm?

Yes, and JS

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