Data.HashTable performance

Gregory Collins greg at
Wed Apr 6 12:37:24 CEST 2011

On Wed, Apr 6, 2011 at 10:23 AM, Johan Tibell <johan.tibell at> wrote:
> If you want a fast mutable hash table Gregory Collins (CCed) have been
> working on a few implementations that beat Data.Hashtable by a large
> margin. I don't know if they're ready for general use yet (i.e. they
> haven't been released on Hackage yet).

Hi all,

The code:

  a) isn't finished
  b) needs to go through my employer's open-source releasing process

But yes, it currently beats Data.Hashtable by something like 4-6x. I
could work on it with some more urgency if people were interested.

Gregory Collins <greg at>

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