https://github.com/okeuday/pqueue

Erlang Priority Queues
https://github.com/okeuday/pqueue

data-structures erlang

Last synced: about 1 month ago
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Erlang Priority Queues

• Host: GitHub
• URL: https://github.com/okeuday/pqueue
• Owner: okeuday
• License: mit
• Created: 2011-11-09T02:53:51.000Z (about 13 years ago)
• Default Branch: master
• Last Pushed: 2023-10-26T18:50:55.000Z (about 1 year ago)
• Last Synced: 2024-09-19T20:18:35.887Z (3 months ago)
• Topics: data-structures, erlang
• Language: Erlang
• Homepage:
• Size: 289 KB
• Stars: 171
• Watchers: 10
• Forks: 17
• Open Issues: 0
• Metadata Files:
  • Readme: README.markdown
  • License: LICENSE

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README

        
Erlang Priority Queue Implementation

====================================

The priority queue implementations implement a subset of the stdlib Erlang queue interface as seen in the implementation used by both [Riak and RabbitMQ](https://github.com/basho/riak_core/blob/master/src/riak_core_priority_queue.erl).

The implementations:

* `priority_queue` (fastest for any priorities when only using a single priority at a time)

* `pqueue` (fastest for 41 priorities, -20 (high) to 20 (low), when using 2 or more priorities at the same time)

* `pqueue2` (slower heap implementation)

* `pqueue3` (faster than `pqueue2` and `priority_queue` when using 64 or more priorities at the same time)

* `pqueue4` (slightly slower than `pqueue` but fastest for allowing 257 priorities, -128 (high) to 128 (low), i.e., fastest when using 42 or more priorities at the same time)

[The latest results are here](http://okeuday.livejournal.com/19539.html), with [the benchmark here](http://github.com/okeuday/erlbench).

Author

------

Michael Truog (mjtruog at protonmail dot com)

Thanks

------

* Jesper Louis andersen (PropEr integration and testing)

* Ulf Wiger (suggestions and insight)

License

-------

MIT License