Lennart Augustsson wrote:
I wouldn't like if unsafePerformIO could never be inlined, sometimes you
want it inlined for performance.
And not all uses are hacky, it's just that when I use it, then burden is
on me to convince myself that it is safe.
unsafePerformIO is currently not inlined - there's a NOINLINE pragma on its
definition in GHC.IOBase, and some comments in there to explain why.
You're right that sometimes you really want it to be inlined - this is why
there's a function called inlinePerformIO in Data.ByteString.Base, for example.
You'd better really know what you're doing before using that one, though :-)
Cheers,
Simon
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