This is the mail archive of the libstdc++@gcc.gnu.org mailing list for the libstdc++ project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [v3] Fix management of non empty hash functor


On 28 January 2013 21:08, François Dumont wrote:
>>
>> (Do the performance benchmarks actually tell us anything useful?
>> When I run them I get such varying results it doesn't seem to be
>> reliable.)
>
> Last time I run the tests it was showing when not caching was better than
> caching.

Yes, I've definitely seen real advantage from not caching (but that
was in my own tests, not the performance testsuite.)

> I have even added a bench on the unordered containers directly to
> show what are the performance of default behavior. For the moment, for the
> Foo type used in 54075.cc, the default behavior is not the best one. But I
> will submit a patch for that soon with a hash traits telling if it is fast
> or not, like we already talk about.

Great, thanks.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]