pqueue

Reliable, persistent, fast priority queues.

Version on this page:1.4.1.1
LTS Haskell 23.19:1.5.0.0@rev:3
Stackage Nightly 2025-04-24:1.5.0.0@rev:3
Latest on Hackage:1.5.0.0@rev:3

See all snapshots pqueue appears in

BSD-3-Clause licensed by Louis Wasserman
Maintained by Lennart Spitzner <[email protected]> Louis Wasserman
This version can be pinned in stack with:pqueue-1.4.1.1@sha256:8e4581063e6d397a78ef53c2811d84efbf7d1498488af2d90c3707eff93c09ff,2214

Module documentation for 1.4.1.1

Depends on 2 packages(full list with versions):
base, deepseq
Used by 2 packages in lts-11.22(full list with versions):
beam-migrate, conduit-algorithms

A fast, reliable priority queue implementation based on a binomial heap.

Changes

Revision history for pqueue

1.4.1.1 – 2018-02-11

  • Remove/Replace buggy insertBehind implementation.

    The existing implementation did not always insert behind. As a fix, the function was removed from Data.PQueue.Max/Min and was rewritten with a O(n) complexity (!) for Data.PQueue.Prio.Max/Min.

  • Adapt for ghc-8.4, based on the ghc-8.4.1-alpha1 release

  • Drop support for ghc<7.4

1.3.2.3 – 2017-08-01

  • Maintenance release for ghc-8.2

1.3.2.2 – 2017-03-12

  • Add test-suite from darcs repository for pqueue-1.0.1.

1.3.2.1 – 2017-03-11

  • Fix documentation errors
    • complexity on toList, toListU
    • PQueue.Prio.Max had “ascending” instead of “descending” in some places

1.3.2 – 2016-09-28

  • Add function insertBehind as a slight variation of insert which differs in behaviour for elements the compare equal.

1.3.1.1 – 2016-05-21

  • Ensure compatibility with ghc-8
  • Minor internal refactors

1.3.1 – 2015-10-03

  • Add Monoid instance for MaxPQueue

1.3.0 – 2015-06-23

  • Lennart Spitzner starts co-maintaining
  • new git repository at github.com:lspitzner/pqueue
  • Ensure compatibility with ghc-7.10