[GHC] #14741: High-memory usage during compilation using Template Haskell

[GHC]

#14741: High-memory usage during compilation using Template Haskell
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        Reporter:  donatello         |                Owner:  sighingnow
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4384
       Wiki Page:                    |
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Comment (by sighingnow):

 Embedding ~100MB static data in haskell code may consume around 40GB
 memory. Currently in TH the `StringPrimL` is built with `[Word8]` rather
 than ByteString.

 Unpacking ~100MB bytestring to `[Word8]` and escaping it already consume
 GBs of memory.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14741#comment:13>
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