Re: Faster StrNCpy

On Mon, 2 Oct 2006, Tom Lane wrote:

> "Sergey E. Koposov" <math@sai.msu.ru> writes:
>> Just the test on IA64 (Itanium2, 1.6Ghz, 8Gb memory). The results seem to
>> be quite different:
>
> What libc are you using exactly?  Can you try it with the unrolled
> strlcpy I posted?

glibc 2.3.5 , gcc 3.4.4

my results were obtained already with your unrolled version (but when I 
first ran it with the 'default' strlcpy the results were the same).

>
> In glibc-2.4.90, there seem to be out-of-line assembly code
> implementations of strncpy for: sparc64 sparc32 s390x s390 alpha ia64
> and an inlined assembler version for i386.  So the x86_64 case is
> nearly the only popular architecture that doesn't seem to have
> a hand-hacked implementation ... which throws some doubt on Mark's and
> my results as possibly not being very representative.


Regards,    Sergey

*******************************************************************
Sergey E. Koposov
Max Planck Institute for Astronomy/Sternberg Astronomical Institute
Tel: +49-6221-528-349
Web: http://lnfm1.sai.msu.ru/~math
E-mail: math@sai.msu.ru