[GHC] #12758: Bring sanity to our performance testsuite

[GHC]

#12758: Bring sanity to our performance testsuite
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  high              |            Milestone:  8.8.1
       Component:  Test Suite        |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15936            |  Differential Rev(s):  Phab:D3758,
       Wiki Page:                    |  Phab:D5059
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Comment (by davide):

 I've been working on some changes recently, which is currently under
 review here [https://gitlab.haskell.org/ghc/ghc/merge_requests/22 !22]. To
 Summarize:
 * Gitlab CI pushes performance results to the
 [https://gitlab.haskell.org/ghc/ghc-performance-notes GHC Performance
 Notes] repo.
   * This is important for logging performance metrics.
 * When running performance tests, establish baseline (expected)
 performance values from older commits (not just the previous one) and even
 use performance numbers pushed from gitlab CI.
   * This should greatly improve usability: for many common workflows this
 will succeed in establishing a baseline where the previous method would
 fail.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12758#comment:22>
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