[Bug c++/54710] moderately large tuple, with many gets, ballons compile time

["cppljevans at suddenlink dot net" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54710

--- Comment #5 from Larry Evans <cppljevans at suddenlink dot net> 2012-09-26 19:01:30 UTC ---
(In reply to comment #4)
> That:
> 
>  --enable-checking=assert,misc,tree,gc,rtl,runtime
> 
> will enable very compile-time intensive internal checking.  Use
> --enable-checking=release or at most the default checking options
> (which are "yes").  If you compare with other compilers always use
> release checking.

Thanks Richard.

I've downloaded:

ftp://gcc.gnu.org/pub/gcc/snapshots/4.8-20120923/gcc-4.8-20120923.tar.bz2

and configured with --enable-checking=release.   As a result, the
gcc times to improve a lot; however, there's still the degredation
of the time w.r.t. clang and the macro, LAST_LESS approaches TUPLE_SIZE:

  LAST_LESS   gcc/clang times
  ---------   ---------------
          4   0.28
         16   1.15
         20   1.70

Certainly 1.70 is much better than 3.34.

A new .zip file is attached.  I don't know if this
indicates there's still a problem.

-regards,
Larry