Persistent<> counts

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Sigbjorn Finne

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Aug 6, 2015, 10:51:49 AM8/6/15
to oilpan-...@chromium.org
Hi,

been peeking at what Persistent<>s the GC gets to work over & the size
of that root set:

youtube.com (non-Oilpan) : ~480 persistents on the first GC after page
load.
youtube.com (Oilpan): ~5100 persistents for same.

I really didn't expect that.

ComputedStyle's StyleRareNonInheritedData's persistents seem to be
behind a considerable portion.

--sigbjorn

Kentaro Hara

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Aug 6, 2015, 10:58:06 AM8/6/15
to Sigbjorn Finne, oilpan-...@chromium.org
Thanks for the digging! Yeah, 5100 persistents sounds a bit too big. (As you know, V8 wrappers no longer have persistents to corresponding Oilpan objects.)



--
Kentaro Hara, Tokyo, Japan

Sigbjorn Finne

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Aug 6, 2015, 11:01:14 AM8/6/15
to Kentaro Hara, oilpan-...@chromium.org
Den 8/6/2015 16:57, Kentaro Hara skreiv:
> Thanks for the digging! Yeah, 5100 persistents sounds a bit too big. (As
> you know, V8 wrappers no longer have persistents to corresponding Oilpan
> objects.)
>
>

Same ratio (for Oilpan vs not) can be seen on other sites also. It's a
worry.

--sigbjorn
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