Library proposal: add a Location interface for element-wise operations on Data.Map (#4887)
ross at soi.city.ac.uk
Fri Jan 14 11:06:00 CET 2011
On Wed, Jan 12, 2011 at 10:53:02PM +0100, Johan Tibell wrote:
> I tried to improve the performance today without much success (but
> much staring at Core). I wonder if the extra allocation of Path data
> constructors is hurting performance.
> Is it worth adding this Interface for all its coolness? Simply using
> 'lookup' plus 'insert' is simpler, as powerful, and only 7% slower.
I've also had no success in speeding it up. It's disappointing that
having the extra information (whether the key was there or not) doesn't
help, but I think I agree.
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