libstdc++/4150: catastrophic performance decrease in C++ code
Loren James Rittle
Mon Apr 15 17:14:00 GMT 2002
In article <email@example.com>,
Jason Merrill <firstname.lastname@example.org> writes:
>>>>>> "Loren" == Loren James Rittle <email@example.com> writes:
>> Having attempted patches similar to your proposal, I think the hammer
>> breaks those test cases that exercise interleaving between C and C++ IO.
> I don't think so. If we're synced to stdio, we get buffers of size 1, so
> it doesn't matter which end we're calculating from.
OK, cool. I am playing with your exact patch for a while. After
rebuilding libstdc++-v3 with it and ensuring no regressions on any
platforms I can personally check; I will look at the interactive
stream cases that have been posted over the years.
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