On Sun, Jun 02, 2013 at 04:53:35PM +0100, Andrew M. Bishop wrote: > I have done some more investigation and the cause of the slowdown > appears to be this bug-fix to eglibc: > > http://sourceware.org/bugzilla/show_bug.cgi?id=13658 > > My (possibly biased) summary of this change is that one user reported > inaccurate sincos results for very large numbers so the eglibc library > was changed so that *all* sin, cos and sincos functions now use soft > maths functions rather than the FPU. > > > Other people are reporting the slowdown as well and there is an eglibc > bug report: > > http://www.sourceware.org/bugzilla/show_bug.cgi?id=14412 > > No solution seems forthcoming and the bug is only marked as an > "enhancement" rather than critical.
The problem is supposed to have been fixed in version 2.18. In practice on my machine, I see that with version 2.18 the performances are almost back to the 2.17 level, with version 2.19 the performances are slightly above 2.17. I therefore guess that the problem is fixed and that the bug could be closed. Could you please try and confirm? -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurel...@aurel32.net http://www.aurel32.net -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
