Kai Tietz <[email protected]> writes: >> Are there known slow spots on the 64 bit runtimes? > > Well, there might be some. I can't actual confirm this finding in > general. The load you see is often application-specific. > I know about a lot of application, which are actual about 30% faster > on 64-bit over 32-bit. Mainly caused by wider memory-moves, and use > of more registers. > > So a profiling would be indeed interesting to learn where your > application spends cycles over the 32-bit. > In general we might have some opportunities to optimize further math for x64.
Yep, a profile comparision is the key here, but gprof refuses to give any numbers (although a 230KB file gmon.out is generated.) Tried with Very Sleepy sampling profiler, which gave suspicious (looking unreliable) results for the 64 bit executable and simply crashed for the 32 bit one. <sigh> [snip] ------------------------------------------------------------------------------ Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ _______________________________________________ Mingw-w64-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
