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Date: Tue, 9 Sep 2003 06:55:25 -0400
From: Jason Tishler <jason AT tishler DOT net>
To: cygwin AT cygwin DOT com
Subject: Re: latest cygcheck -c is expensive
Message-ID: <20030909105525.GA1892@tishler.net>
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References: <20030905124047 DOT GD1852 AT tishler DOT net> <Pine DOT GSO DOT 4 DOT 56 DOT 0309051113580 DOT 26266 AT slinky DOT cs DOT nyu DOT edu> <20030905190127 DOT GB4483 AT redhat DOT com> <20030906004249 DOT GO1852 AT tishler DOT net> <20030907042805 DOT GA22596 AT redhat DOT com> <20030907043021 DOT GA22644 AT redhat DOT com> <20030908115016 DOT GC2128 AT tishler DOT net> <20030908153621 DOT GE5065 AT redhat DOT com> <20030908203203 DOT GE1888 AT tishler DOT net> <20030908210522 DOT GI27113 AT redhat DOT com>
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On Mon, Sep 08, 2003 at 05:05:22PM -0400, Christopher Faylor wrote:
> On Mon, Sep 08, 2003 at 04:32:04PM -0400, Jason Tishler wrote:
> >I see a minor speed up (now) -- 1:24 versus 1:18.  Note this is on my
> >laptop.  Maybe the disk subsystem is so slow as to dominate the
> >throughput?
> 
> In that case, loading gzip.exe once for every package file should have
> shown a substantial penalty.

Due to NT's file system cache, I don't believe the above to be an issue.
I actually have to "flush the cache" between cygcheck runs, otherwise
subsequent runs are *much* faster:

    $ time cygcheck -c >/dev/null

    real    0m9.683s
    user    0m0.010s
    sys     0m0.020s

Of course, the latest version has eliminated the cost of forking gzip
once for every package file.

> Maybe you have fewer packages loaded than I do?

I don't know.  I have the following:

    $ cygcheck -c | wc -l
        319

Jason

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