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Releases: dynatrace-oss/hash4j

v0.9.0

02 Apr 15:41
@oertl oertl
v0.9.0
01cf0d5
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v0.9.0

New features:

  • implementation of ImoHash algorithm useful for file hashing
  • implementation of JumpHash for distributed agreement
  • added HashValue128.toByteArray and HashValue128.toString

Bug fixes:

  • fixed bug in martingale estimator for UltraLogLog affecting distinct counts >= 10^15
  • fixed bug in ML estimator for HyperLogLog affecting distinct counts >= 10^15

Incompatible changes:

  • removed HyperLogLog.SMALL_RANGE_CORRECTED_RAW_ESTIMATOR (use HyperLogLog.CORRECTED_RAW_ESTIMATOR instead)

Full Changelog: v0.8.0...v0.9.0

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v0.8.0

06 Feb 08:36
@oertl oertl
v0.8.0
93b6e76
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v0.8.0

New features:

  • implementation of Wyhash final version 4
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v0.7.2

30 Jan 19:52
@oertl oertl
v0.7.2
50761d6
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v0.7.2

New features:

  • alternative distinct count estimators for HyperLogLog and UltraLogLog
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v0.7.1

13 Dec 20:59
@oertl oertl
v0.7.1
55a137c
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v0.7.1

New features:

  • martingale estimator that can be used in conjunction with HyperLogLog and UltraLogLog
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v0.7.0

30 Oct 09:52
@oertl oertl
v0.7.0
3f74c8a
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v0.7.0

New features:

  • new HyperLogLog implementation
  • added PackedArray.update(byte[], int, long, LongBinaryOperator)
  • added PackedArray.readIterator(byte[], int)
  • added Hasher.getHashBitSize()
  • added HashStream.reset()

Improvements:

  • faster Hasher.hashCharsToLong(CharSequence) implementations

Incompatible changes:

  • made HashStream interface package-private, use HashStream32, HashStream64, HashStream128 instead
  • made Hasher interface package-private, use Hasher32, Hasher64, Hasher128 interfaces instead
  • eliminated HashSink.putUnorderedIterable(Iterable, HashFunnel, Supplier), use HashSink.putUnorderedIterable(Iterable, HashFunnel, Hasher64) instead
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v0.6.2

01 Oct 06:34
@oertl oertl
v0.6.2
b83b2f8
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v0.6.2

Improvements:

  • UltraLogLog: Improved estimation bias, especially for small precisions

New features:

  • PseudoRandomGenerator: Generation of exponentially and uniformly distributed random double values
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v0.6.1

26 Sep 18:30
@oertl oertl
v0.6.1
97d4568
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v0.6.1

Improvements:

  • better and faster estimation algorithm for UltraLogLog
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v0.6.0

02 Sep 09:59
@oertl oertl
v0.6.0
08250dc
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v0.6.0

New features:

  • Similarity hashing algorithms:
    • MinHash
    • SuperMinHash
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v0.5.0

10 Jun 14:47
@oertl oertl
v0.5.0
1a1ddcf
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v0.5.0

New features:

  • UltraLogLog, a sketch for approximate distinct counting
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v0.4.0

31 May 08:21
@oertl oertl
v0.4.0
2ad5983
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v0.4.0

New features:

  • Streaming functionality: Hasher.hashStream() opens a new hash stream
  • New convenience functions:
    • HashSink and HashStream define various put methods for native arrays
    • Direct hashing of char sequences:
      • Hasher32.hashCharsToInt
      • Hasher64.hashCharsToLong
      • Hasher128.hashCharsTo128Bits

Bug fixes:

  • WyhashFinal3.putBytes gave wrong results for nonzero offsets
Assets 2
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