Slow/sluggish response ("system" task at 50%)

[Edward Lam]

PS. So I went ahead and repeated the tr test on an older (Intel Core 2
Quad 2.66 GHz) machine with cygwin 1.5 on Windows *32-bit*:

$ time -p for ((i=1; i<100; i++)); do var=$(echo $i | tr [a-z] [A-Z]); done
real 2.64
user 6.56
sys 1.85

We're talking about a difference between an Intel processor ONE GENERATION
OLDER, on an older version of cygwin, yet being a few times FASTER.

On Wed, June 24, 2009 21:49, Edward Lam wrote:
> On Wed, June 24, 2009 17:29, Larry Hall (Cygwin) wrote:
>> Sure, we all know that Cygwin provides Linux emulation and suffers some
>> overhead for it.  But timings from an individual machine can be
>> misleading.
>> Running this through multiple times for both Mingw and Cygwin 1.7 on my
>> similarly equipped machine, I see Cygwin is somewhere between 1.7 and
>> 2.25
>> times slower.  Whether yours or my result is more typical, I can't say.
>> But as you noted, neither data set provides much justification for the
>> results reported.
>
> Larry,
>
> Are you on 32-bit Windows or 64-bit Windows? I've noted on this mailing
> list earlier that there are large speed differences between the two. I
> wonder which platform Gene is on. The tr test results are consistent on
> Windows 64-bit for me.
>
> I don't quite understand what MINGW32 is doing that makes it ~2 times
> faster than cygwin.
>
> -Edward
>
>
>
>



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