[GHC] #8413: testsuite: Allow to skip performance tests

[GHC]

#8413: testsuite: Allow to skip performance tests
------------------------------------+-------------------------------------
       Reporter:  nomeata           |             Owner:  nomeata
           Type:  feature request   |            Status:  new
       Priority:  normal            |         Milestone:
      Component:  Test Suite        |           Version:  7.6.3
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
------------------------------------+-------------------------------------
 More often than not the output of the performance tests is in the way,
 rather than helping, or simply not relevant at a certain time of
 development (e.g. after changing some error message generating code in the
 compiler). It would be nice to have a way to skip such tests.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8413>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler