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Date:	Sat, 2 Aug 2003 18:02:44 -0700 (PDT)
From:	vikramshrowty AT yahoo DOT com
X-X-Sender:	vikram AT hidis DOT cjb DOT net
Reply-To:	vikramshrowty AT fastmail DOT fm
To:	cygwin AT cygwin DOT com
Subject:	cygwin performance hit
Message-ID:	<Pine.LNX.4.50.0308021748060.14889-100000@hidis.cjb.net>
MIME-Version:	1.0

Hi,	
	Im seeing a severe perfomance hit from cygwin. Heres the result of
$time make_depend with a cygwin-compiled makedepend:
------------------------------------------------------------------------
2.65user 27.90system 9:22.59elapsed 5%CPU (0avgtext+0avgdata 49856maxresident)k
0inputs+0outputs (3190major+0minor)pagefaults 0swaps
------------------------------------------------------------------------
and heres the output from a -mno-cygwin compiled makedepend:(the same code)
------------------------------------------------------------------------
0.09user 0.04system 2:13.47elapsed 0%CPU (0avgtext+0avgdata 43280maxresident)k
0inputs+0outputs (2781major+0minor)pagefaults 0swaps
------------------------------------------------------------------------

I ran an strace on the cywinized makdepend and ran a sort -k 1 -r on
the output.( to sort the functions by the time-delta). There are a lot
of calls to GetFileAttributes at the top of the sorted output...like this

------------------------------------------------------------------------
97332 19244539 [main] build_makedepend 331 symlink_info::check:
GetFileAttributes (\\asic-auth\homes\NT\dev\src\tool\tool-list\sys.h)
failed
------------------------------------------------------------------------

Thats a network mounted directory so I suppose some slowdown is
expected but shouldnt the native (-mno-cygwin) version see the same
slowdown? Is there a reason for cygwin-compiled programs to see a
larger hit?

Thanks,
--Vikram

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