[GHC] #7674: Separate StablePtr table from StableName table.

[GHC]

#7674: Separate StablePtr table from StableName table.
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Reporter:  EyalLotem         |          Owner:  EyalLotem                             
    Type:  task              |         Status:  patch                                 
Priority:  normal            |      Component:  Runtime System                        
 Version:  7.6.2             |       Keywords:  rts stable_ptr stable_name performance
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple                      
 Failure:  None/Unknown      |      Blockedby:                                        
Blocking:                    |        Related:                                        
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Comment(by EyalLotem):

 Also ran the benchmark without the specified heap size:

 ||                        || unpatched || patched ||
 ||-threaded, no heap size || 24.5s     || 10.1    ||
 ||no heap size            || 23.1s     || 8.3s    ||

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7674#comment:3>
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