[Haskell-cafe] poor perfomance of indexU in uvector package

[Felipe Lessa]

On Sun, Nov 15, 2009 at 06:16:03PM +0300, Alexey Khudyakov wrote:
> >   Another implementation you may try is
> >
> >  a' = mapU (\(i :*: x) -> (i `mod` n) :*: x) (indexedU a)
> >  mkSlice j = fstU $ filterU (\(i :*: x) -> i == j) a'
> >
>
> This one is fastest so far

Nice!  Just for the record, of course I meant 'sndU' :).  Thanks
god Haskell is statically typed and that error should be caught
rather easily.

--
Felipe.