[GHC] #13220: Performance regressions in testsuite from join points

[GHC]

#13220: Performance regressions in testsuite from join points
-------------------------------------+-------------------------------------
        Reporter:  lukemaurer        |                Owner:  lukemaurer
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:  JoinPoints
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 And does this address Joachim's comment on
 [https://phabricator.haskell.org/rGHC2effe18ab51d]?
 {{{
 This might be interesting for @lukemaurer:
 According to
 https://perf.haskell.org/ghc/#revision/2effe18ab51d66474724d38b20e49cc1b8738f60
 this patch undid the effect of join points on fannkuch-redux (i..e
 allocation goes up by 1318762.9%, but runtime goes down by 5%). Was this
 ever cleared up?

 Also, integer runtime goes up by 13%,
 and hidden by 6%, and code size generally by around 4%. Expected?
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13220#comment:31>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler