datasketches-cpp-3.3.0

• several fixes with respect to allocations using a provided allocator instance
• fixes and improvements in cmake files for including DataSketches as dependency in other projects
• Tuple sketch serial version 3 for compatibility with Java
• support for older serialization versions of Theta sketch
• added reset() method in Theta and Tuple sketch and union
• minor changes to some corner cases of Theta and Tuple intersection and a-not-b operations

Known problems:

• support for older serialization versions of Theta sketch is incomplete: deserialize from bytes does not handle old versions
• REQ sketch get_PMF() has undefined behavior for empty sketches (can crash). Check is_empty() before calling get_PMF()

3.2.0

This version includes the following changes:

• Fix issue #236 , a serialization bug in the KLL sketch
• Refactored python to remove pybind11 as a submodule. It is now a dependency only for building the package
• Updated LICENSE file to reflect how pybind11 is used
• Added convenience binaries for python available from https://pypi.org/project/datasketches

datasketches-cpp-3.1.0

• Kolmogorov-Smirnov test for KLL sketch
• custom seed support in Theta Jaccard similarity
• Theta union bug fix
• added get_max_serialized_size_bytes method for KLL and CPC sketches
• added wrapped_compact_theta_sketch to avoid some cost of deserialization
• massive code cleanup to avoid compiler warnings
• iterator fix in KLL sketch
• iterator fix in REQ sketch
• exception safety fix in theta_update_sketch_base
• misaligned access fix in MurmurHash3

datasketches-cpp-3.0.0

• Introduction of new Relative Error Quantiles Sketch,
• Added Tuple sketch and rewritten Theta sketch to share the same base,
• Performance improvement of HLL sketch,
• Removed serialization of Update Theta sketch and Union, and HLL Union,
• Added support for passing instances of allocators

Apache Release 2.1.0-incubating

• fixed potential crash when querying KLL with complex types
• added vector_of_kll to python
• added help text to all python methods

Apache Release 2.0.0-incubating

• header-only library
• fully allocator-aware
• exception-safe
• varopt sampling added
• API changes for consistency

Apache Release 1.0.0-incubating

The first release.

• KLL quantiles sketch
• Frequent items sketch
• CPC distinct-counting sketch
• Theta distinct-counting sketch with set operations
• HLL distinct-counting sketch