[Bug 30148] Star Wars: The Old Republic - slow loading times

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=30148

--- Comment #19 from julusp at gmail.com 2012-04-07 22:12:22 CDT ---
(In reply to comment #18)
> mmap is very slow on Mac OS, there's nothing we can do about that.

I made some test myself (mmap/munmap) and the MAP_PRIVATE flag makes really
slow:
MAP_PRIVATE 1000 mmaps (real/user/sys): 20.717s/0.008s/20.671s
MAP_SHARED 1000 mmaps (real/user/sys): 0.010s/0.001s/0.008s

same script on linux
MAP_PRIVATE 1000 mmaps (real/user/sys): 0.008s/0.000s/0.008s


according to vmmap command, game uses MAP_PRIVATE.

also I found old communication about git, describing the same problem on osx.
Linus suggested to use pread() instead, and the result was: from (estimated) 37
minutes using mmaps to 52 seconds using pread(). 
source: http://www.spinics.net/lists/git/msg18258.html

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