[Bug debug/28547] New: Large compile time regression with -g

[pbrook at gcc dot gnu dot org]

The attached code shows a large (between 2x and 10x) increase in compile time
when compiled with -g.
With gcc head "-g -O" -ftime-report says:

 symout                :  14.26 (59%) usr   0.09 (24%) sys  15.35 (59%) wall  
13879 kB (17%) ggc
 variable tracking     :   0.86 ( 4%) usr   0.03 ( 8%) sys   0.89 ( 3%) wall  
28140 kB (34%) ggc

With gcc 4.1 even larger slowdowns are also observable with "-O2 -g" and "-O2
-g -fomit-frrame-pointer". These don't seem to occur with head


-- 
           Summary: Large compile time regression with -g
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: compile-time-hog
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pbrook at gcc dot gnu dot org
GCC target triplet: arm-none-linux-gnueabi


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28547