[GHC] #16190: Speed up handling of large String literals

[GHC]

#16190: Speed up handling of large String literals
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        Reporter:  hsyl20            |                Owner:  (none)
            Type:  task              |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.6.3
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |  https://gitlab.haskell.org/ghc/ghc/merge_requests/143
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Comment (by Marge Bot <ben+marge-bot@…>):

 In [changeset:"0f1eb88c93143359fa671bb72aceebc299c87a95/ghc"
 0f1eb88c/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="0f1eb88c93143359fa671bb72aceebc299c87a95"
 Add perf test for #16190
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16190#comment:12>
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