Re: libstdc++/4150: catastrophic performance decrease in C++ code

[Loren James Rittle <rittle at latour dot rsch dot comm dot mot dot com>]

>> Done.

> Great. Thanks again for all your efforts.

Yes, thank you Jason.  I can confirm no regressions with
i386-*-freebsd4.5.  I updated docs/html/17_intro/porting.texi to
reflect the removal of _GLIBCPP_AVOID_FSEEK.

I can also confirm that adding ``std::ios::sync_with_stdio(false);''
now speeds up the cin run of the test case to be the same as the run
with a newly opened file.  There used to be no difference in this
environment.

> Now, I believe this fixes the current 'high' priority GNATS bugs, both
> 4150 and 5396. If so, can you put them into feedback or close them? 
> It would be appreciated.

I just reread 4150 and 5396 (and tested both with truss and time) and
agree that Jason got them.  I can confirm that the profile of the
system calls now looks as expected.

> Loren, I think you had a patch on top of Jason's. Can you give status
> please?

I am looking at it again against what Jason committed today.  I will
post something ASAP.

> I'll start working on the intractivity bug, represented by 5820.

I can report that Jason's patch did not affect this test case on
i386-*-freebsd4.5 (where it already worked as expected by the PR
submitter and myself).

Regards,
Loren