Vadim, Thanks for the feedback on the -win32. A dependency on a small DLL with BSD license does not sound too bad, but performance regression is obviously a serious problem.
However, by disabling <mutex> use with -pthreads rust performance should be same as -win32 threads? Saying it another way, does the -win32 version have any feature that -pthreads vesion do not have? Yaron 2014-09-25 9:52 GMT+03:00 Vadim Chugunov <vadi...@gmail.com>: > Hi, > I think I can at least answer why the Rust project prefers to use > mingw-w64-win32threads: > 1. It does not inject dependency on libwinpthread.dll, which is nice. > 2. Those who tried building LLVM with mingw-w64-pthreads, had reported > significant slowdown of the resulting Rust compiler (as compared to one > linked to LLVM compiled with the win32threads flavor). Profiling seemed > to point towards libpthreads' implementation of mutex. I had checked the > source, and indeed, it looked not very efficient ( > http://sourceforge.net/p/mingw-w64/bugs/344). It would be nice to get a > second opinion, though, maybe I missed something. > > Vadim > > > On Wed, Sep 24, 2014 at 10:55 AM, Chandler Carruth <chandl...@google.com> > wrote: > >> >> On Wed, Sep 24, 2014 at 10:37 AM, Óscar Fuentes <o...@wanadoo.es> wrote: >> >>> The best thing for understanding their reasons is to ask them to speak >>> up. >>> >> >> I asked them directly, and this thread is a chance for them to speak up >> again. I *think* I've addressed the concerns of those I've spoken to >> directly, but there may be other folks or other concerns or I may have >> messed it up. =] >> >> >>> My experience on the MinGW/MinGW-w64 communities is that those who >>> choose MinGW is because of ignorance about MinGW-w64 and because there >>> are lots of documents on the 'net that references MinGW. MinGW is, to >>> all practical effects, a zombie project and there is no reason to prefer >>> it over MinGW-w64 nowadays. >>> >> >> :: shrug :: >> >> I'm not such a user, and so I don't want to speculate as to what >> motivates them. >> >> _______________________________________________ >> LLVM Developers mailing list >> llvm...@cs.uiuc.edu http://llvm.cs.uiuc.edu >> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev >> >> > > _______________________________________________ > LLVM Developers mailing list > llvm...@cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev > >
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