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Re: Optimizing away "ReadFile" calls when Make calls stat()
jik-cygwin@curl.com wrote:
>
> > Date: Tue, 13 Feb 2001 14:09:48 -0500
> > From: Earnie Boyd <earnie_boyd@yahoo.com>
> >
> > This sounds very interesting but I believe work to eliminate TWO
> > ReadFiles would be best; but, I don't know if this is possible.
>
I stated this sloppy. My intention was as you've discussed already with
Larry.
> I don't understand what you mean. The experiment I did yesterday
> *did* eliminate both ReadFiles. However, I don't think Make can
> eliminate both ReadFiles *by default* because Make can't assume that
> the user doesn't use any symlinks unless the user tells it to assume
> that.
>
> > I have found the following set of GCC flags to have great impact
> > with the speed with wish Cygwin flies.
>
> How gcc should be called when compiling Cygwin is an interesting
> question, but it's not the one I'm asking here. I hope the people
> from RedHat who compile the Cygwin packages that go up on the Web
> sites consider your suggestion, though :-).
>
You are looking for ways to "speed up execution". I was suggesting you
try the suggested switches as another means to speed up execution. I
can rebuild the Cygwin dll in ~10 minutes doing a `make clean && make'.
BTW, repetitive stats are already cached which can be seen by timing an
`ls /bin' repetitively. Also, Cygwin will always be slower than Linux.
Win32 is just slower. It's like comparing a tortoise with a hare.
Earnie.
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