[Bug middle-end/54114] [4.8 Regression] variable-tracking performance regression from 4.8-20120610 to 4.8-20120701

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54114



Jakub Jelinek <jakub at gcc dot gnu.org> changed:



           What    |Removed                     |Added

----------------------------------------------------------------------------

             Status|NEW                         |RESOLVED

                 CC|                            |jakub at gcc dot gnu.org

         Resolution|                            |WONTFIX



--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-18 
11:01:24 UTC ---

 variable tracking       :   0.08 ( 1%) usr   0.01 ( 3%) sys   0.11 ( 1%) wall 

  3165 kB ( 3%) ggc

 var-tracking dataflow   :   0.36 ( 4%) usr   0.00 ( 0%) sys   0.38 ( 4%) wall 

   226 kB ( 0%) ggc

 var-tracking emit       :   0.31 ( 3%) usr   0.00 ( 0%) sys   0.36 ( 4%) wall 

  2186 kB ( 2%) ggc



for me, I'd call this insignificant, given that it was really a debug info

correctness fix.

We have PR54402 which tracks cases where the slowdown is actually significant.