[GHC] #9577: String literals are wasting space

[GHC]

#9577: String literals are wasting space
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              Reporter:  xnyhps      |            Owner:  xnyhps
                  Type:  bug         |           Status:  new
              Priority:  low         |        Milestone:
             Component:  Compiler    |          Version:  7.8.2
  (NCG)                              |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  Runtime     |  Related Tickets:
  performance bug                    |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by dfeuer):

 Replying to [comment:15 carter]:
 > One question I've got about this whole thread is this:
 > What would this improve? I'm trying to understand how this will impact
 application performance or binary sizes (though I understand the latter is
 definitely neglible)

 Very good question. As someone who knows very little about these issues,
 it seems to me that there are probably approximately three related issues
 that will affect performance:

 1. Aligning strings to word boundaries seems to be good for all sorts of
 reasons (comparison, copying, searching, etc.).

 2. Arranging for code that (exclusively) uses a string to be likely to
 bring the beginning of the string in on its cache line should often be
 good. This kind of thing goes beyond strings, of course, and I have no
 idea what GHC does about it in general.

 3. Dragging an error message fragment in on a cache line should always be
 bad.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9577#comment:16>
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