[Bug 26658] Steam startup is slow

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=26658

Mihail Balabin <mbalabin at googlemail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |mbalabin at googlemail.com

--- Comment #7 from Mihail Balabin <mbalabin at googlemail.com> 2012-12-23 02:20:06 CST ---
I have just upgraded from wine 1.5.18 to 1.5.20. It seems that steam startup
became much faster. Were any steam-related changes made between those versions?

--- Comment #8 from Javier Kohen <jkohen at users.sourceforge.net> 2013-01-12 03:29:11 CST ---
Created attachment 43156
  --> http://bugs.winehq.org/attachment.cgi?id=43156
Instrumentation for FILE_CreateFile

I've used the attached patch to instrument FILE_CreateFile. First, I see no
calls with FILE_OPEN_BY_FILE_ID. Second, on my SSD drive the cumulative search
time for Steam startup and shutdown adds up to less than a second, and the
cumulative time in FILE_CreateFile is less than 1.5 seconds. Yet Steam takes 45
seconds to start (measured with a stop watch).

In any case, a quick grep/sort/uniq on the trace shows that on average Steam
makes 3 identical calls to FILE_CreateFile (same handle/name/etc.), and visual
inspection indicates that most of the calls are for the same files over and
over. Caching might help HDD owners (it'd be nice if somebody ran my test
though, because the file system cache should cover that), but it doesn't seem
to be the worst contributor to the overall startup.

I'm curious, has anybody compared the start up time to native Linux Steam start
up times? It seems a hassle to install it on Debian, so I haven't bothered.

To reproduce:
1. patch in my change (diff against Wine 1.5.21).
2. make LDFLAGS=-lrt
3. env WINEDEBUG=+ntdll wine … &> /tmp/wine-ntdll.log

Search time:
$ grep "search took" /tmp/wine-ntdll.log  | awk 'BEGIN { total = 0; } { total
+= $5; } END { print total; } '
909038970

NtCreateFile time:
$ grep "createfile took" /tmp/wine-ntdll.log  | awk 'BEGIN { total = 0; } {
total += $5; } END { print total; } '
1346543118

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