[GHC] #7258: Compiling DynFlags is jolly slow

[GHC]

#7258: Compiling DynFlags is jolly slow
---------------------------------+------------------------------------------
    Reporter:  simonpj           |       Owner:  igloo           
        Type:  bug               |      Status:  new             
    Priority:  normal            |   Milestone:  7.8.1           
   Component:  Compiler          |     Version:  7.6.1           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
---------------------------------+------------------------------------------

Comment(by igloo):

 {{{
     Fri Oct 19 20:23 2012 Time and Allocation Profiling Report  (Final)

        ghc-stage2 +RTS -p -h -RTS -B/home/ian/ghc/git/ghc/inplace/lib
 -fforce-recomp -c W2.hs

     total time  =       26.08 secs   (26080 ticks @ 1000 us, 1 processor)
     total alloc = 14,601,152,424 bytes  (excludes profiling overheads)

 COST CENTRE       MODULE         %time %alloc

 OccAnal           SimplCore       27.0   24.5
 RegAlloc          AsmCodeGen      19.2   22.4
 pprNativeCode     AsmCodeGen      16.8   19.9
 regLiveness       AsmCodeGen       8.0    6.3
 genMachCode       AsmCodeGen       5.0    5.4
 StgCmm            HscMain          4.3    3.5
 occAnalBind.assoc OccurAnal        3.3    3.3
 tops              CmmPipeline      3.3    3.4
 SimplTopBinds     SimplCore        1.7    1.6
 do_block          Hoopl.Dataflow   1.1    0.8
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7258#comment:3>
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