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<p style="margin: 0px 0px 1.2em ! important;">On 2017-12-07 03:33
PM, Brandon Allbery wrote:</p>
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<p style="margin: 0px 0px 1.2em ! important;">Certainly the
behavior here sounds wrong and should be reported.</p>
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<p style="margin: 0px 0px 1.2em ! important;"><a
href="https://ghc.haskell.org/trac/ghc/ticket/14564">https://ghc.haskell.org/trac/ghc/ticket/14564</a>
- there’s already been a response (from Simon P-J) and it is
being treated as a bug.</p>
<p style="margin: 0px 0px 1.2em ! important;">I get the slowdown
with 8.0.2, 8.2.1 and 8.2.2 but 7.10.3 is OK.</p>
<p style="margin: 0px 0px 1.2em ! important;">Since 8.2.2 is very
recent (20 Nov) I didn’t go to the trouble of building ghc from
source.</p>
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