[Haskell-cafe] [ANN] compact-sequences-

☂Josh Chia (謝任中) joshchia at gmail.com
Wed Sep 2 04:19:32 UTC 2020

Could you elaborate on what the package does? The description is "Stacks,
queues, and deques that take n + O(log n) space at the cost of having
amortized O(log n) time complexity for basic operations." But why is it a
'cost' to have O(log n) instead of O(n) cost for basic operations on
list-like structures (such as insert and delete presumably)? So, I didn't
understand what the package is for.

Do you mean "take amortized O(log n) time for basic operations at the cost
of n + O(log n) space"? Or is it something else I didn't imagine?

On Wed, Sep 2, 2020 at 4:17 AM David Feuer <david.feuer at gmail.com> wrote:

> I am pleased to release the second version of the compact-sequences
> package, now with deques!
> Changes:
> * Add deques.
> * Change operator precedence.
> * Add a test suite. Thanks to David Himmelstrup for setting up the
> test and CI framework.
> * Clean up internals somewhat.
> * Add a proof of amortized bounds for the stack implementation.
> Thanks, Li-Yao Xia.
> There are still plenty of things to work on, and help is always welcome.
> David Feuer
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