[GHC] #11653: Time compiler passes

[GHC]

#11653: Time compiler passes
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  bgamari
            Type:  feature request   |               Status:  patch
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1959
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by bgamari):

 * status:  new => patch
 * differential:   => Phab:D1959
 * milestone:   => 8.0.1


Comment:

 > Note that at least the Core-to-Core passes have SCC annotations for each
 pass

 Indeed, but these help little when working with an un-profiled compiler. I
 would really like to be able to track these timings over time, in hopes
 that they will help in localizing performance regressions within the
 compiler.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11653#comment:3>
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