Arrays and arrays

[Ketil Z Malde]

"Simon Marlow" <simonmar@microsoft.com> writes:

> That's because currently large objects aren't included in the profile.

Okay, I didn't know that.

> I'll look into fixing this.

Great!  But just knowing about it also helps a lot.

Since you're on the line, could you confirm or deny that the (//)
operator is something equivalent to (roughly):

    a // ps = runST (thaw a >>= \u -> update ps >> unsafeFreeze u)

I.e. that the list of updates are treated as an atomic operation?
Because doing it that way explicitly sure didn't seem to help.

OTOH, doing lots of small (//) seems to be faster than doing a few
large ones (containing the same updates).  Go figure.

BTW: does anybody know an accepted fastest way of doing in-place
permutations on an array?

-kzm
-- 
If I haven't seen further, it is by standing in the footprints of giants