Updates:
Cc: [email protected] [email protected]
Comment #3 on issue 16581 by [email protected]: Browser unresponsive until
all tabs finish load
http://code.google.com/p/chromium/issues/detail?id=16581
Just to clarify... am I correct that this is NOT about startup time with
multiple
tabs, but rather about clicking on links to either "open in new tab"
or "open in new
window." For example, you might (in an existing tab) open links by
shift-clcking a
link, or ctrl-clicking a link.
Am I also correct that the problem is that scrolling etc. in the original
tab is
seemingly blocked while the throbber appears in the top of the
(undisplayed) pending
tabs?
I'm not especially familiar with the sequence surrounding creation of new
renderer
tabs... but perchance we are being more liberal about creating new
processes (rather
than using tabs to hold multiple sites) and that is slowing us down. In the
worst
case, it would be a bad thing if we somehow blocked the UI thread during
these
process constructions. I'm going to cc a few folks in case they're aware
of any
process count changes that might be having an impact.
We *might* be able to see some evidence of jankiness by looking at
about:histograms
and seeing if "Chrome.ProcMsgL UI" or "Chrome.ProcMsgL UI" were picking up
a lot of
samples of events that are taking a looooong time. I have seen some
strange stuff
initially in those histograms... so it would be important to see that
things got
worse when you tried to repro this bug (i.e., we got a lot of long
samples. Note
those histograms have times in milliseconds, and hence *should* only have
samples
that are very short, way under 100ms).
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