[Bug 21423] Visual C++ 2005 slow?

wine-bugs at winehq.org wine-bugs at winehq.org
Sun Jan 31 18:35:04 CST 2010


--- Comment #8 from Dan Kegel <dank at kegel.com>  2010-01-31 18:35:04 ---
Yes.  There is one directory with 1900 files in it.
Using http://www.winehq.org/pipermail/wine-patches/2008-June/056508.html
and then doing WINEDEBUG=+timestamps,+file, I could
see that searching that directory for any particular file 
takes as long as 3ms, as measured by the time it took between

trace:file:wine_nt_to_unix_file_name L"\\Program Files\\Microsoft
SDKs\\Windows\\v7.0\\Include\\typeinfo" not found in
/home/dank/.wine-chromium-tests/dosdevices/c:/Program Files/Microsoft

and the trace message immediately before it.

Furthermore, adding a kludgy bloom filter cache to GetFileAttributesW
halved the time to compile base (from 43 seconds to 24 seconds),
so that's definitely the sore spot.  I'll attach the bloom filter patch,
but it's a total kludge, so it's only good for demonstrating the bottleneck.

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