non-linear complexity of :reload combined with :module in ghci

Simon Marlow marlowsd at gmail.com
Mon Jul 11 14:39:54 CEST 2011


On 04/07/2011 22:45, Simon Hengel wrote:
> Hi all,
> I realized that ghci shows non-linear time complexity for a sequence of
> :module and :reload commands, say we do multiple times:
>
>    :module *Foo
>    :reload
>
> Steps to reproduce:
>
>    time for i in {1..10}; do echo -e ':m Prelude\n:r'; done |ghci
>    time for i in {1..99}; do echo -e ':m Prelude\n:r'; done |ghci
>
> On my system the first run uses 1 second of CPU time, the second 39
> seconds.  Is this considered a bug?

Could you create a ticket please?  That looks like an interesting result 
and we should investigate.

Cheers,
	Simon






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