Re: qsort (was Re: Solaris)
От | Mark Kirkwood |
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Тема | Re: qsort (was Re: Solaris) |
Дата | |
Msg-id | 3EC2A8A5.4010408@paradise.net.nz обсуждение исходный текст |
Ответ на | Re: qsort (was Re: Solaris) (dalgoda@ix.netcom.com (Mike Castle)) |
Ответы |
Re: qsort (was Re: Solaris)
|
Список | pgsql-general |
Mike Castle wrote: >First I added a counter to the compare function, and the most cases, the >glibc implementation was called significantly less often than the BSD >compare function. > > Interesting - all examples I tried had glibc compare count higher, do you want to post one of yours? >In a simple test function, like comparing two ints, then yes, the BSD >implementation was faster. But in a more complex function, say comparing >strings, often times the glibc version was faster. Why? Because the >time spent in the compare function became the overwhelming factor. > > Considering strings is a good point - I went away and tried some examples, unfortunately I only managed to see BSD faster, but the difference was not as large as in the integer tests. regards Mark
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