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

[egallager at gcc dot gnu.org]

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

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |egallager at gcc dot gnu.org

--- Comment #11 from Eric Gallager <egallager at gcc dot gnu.org> ---
Created attachment 41894
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41894&action=edit
result of compiling with -ftime-report -ftime-report-details -fstats

(In reply to Larry Evans from comment #10)
> Created attachment 28294 [details]
> with optimized clang, still with optimized gcc, both with -O1
> 
> Remade clang with make ENABLE_OPTIMIZED=1.  Clang times improved a lot.
> 
> Now, the degradation of relative performance of gcc w.r.t. clang
> is more dramatic.
> 
> Still, gcc does better at low LAST_LESS, but reaches break even
> at lower LAST_LESS (about 8).

Confirmed:

$ /usr/local/bin/gcc -c -O1 -time tuple.benchmark.mini.horiz.cpp
# cc1plus 4.62 0.25
# as 0.02 0.01
$

I guess 4 and a half seconds is kinda long. Attaching a more detailed time
report as a separate file.