Blosc2 v4.1.0

• Add DSL kernel functionality for faster, compiled, user-defined functions which broadly respect python syntax and implement the LazyArray interface. See the introductory tutorial at: https://blosc.org/python-blosc2/getting_started/tutorials/03.lazyarray-udf-kernels.html
• Add read-only mmap support for store containers:
  DictStore, TreeStore, and EmbedStore now accept mmap_mode="r"
  when opened with mode="r" (including via blosc2.open for .b2d,
  .b2z, and .b2e).
• New .meta entry for store containers, allowing better store recognition at blosc2.open() time. Fixes #546.
• Add cumulative_sum and cumulative_prod functions for Array API compliance.
• Add Unicode string arrays, support comparison operations with them, and optimised compression path.
• Add endswith and startswith and extend contains to support strings and offer miniexpr multithreaded computation when possible.
• Use DSL kernels to accelerate arange/linspace constructors by 6-10x.
• Improve documentation for filters and filters_meta.
• Fix edge case issues with resize and constructors so that chunks may be set independently of shape, and arrays may be extended from empty consistently.
• Continued work on miniexpr integration, interface, and support.
• Ruff fixes and implementation of PEP recommendations.

Blosc2 v4.0.0

What's Changed

The main change is hyperfast fully multithreaded computation with miniexpr (final PR * Miniexpr for Windows by @FrancescAlted in #565).
In addition, the internal wheel structure has been changed to implement PEP 427 (@lshaw8317 in #560). In addition:

• feat: add support for .b2z, .b2d, .b2e files and update related tests by @bossbeagle1509 in #541
• Add none indexing for lazyudf/lazyarray by @lshaw8317 in #545
• Respect NUMEXPR_MAX_THREADS when setting numexpr thread count by @skmendez in #567
• Add openzl_plugin support by @lshaw8317 in #559

Full Changelog: v3.12.2...v4.0.0

Blosc2 v4.0.0-b1

This is a beta version with hyperfast multithreaded expression calculatio via the incorporation of miniexpr; as well as better support for plugins (stay tuned for blosc2_openzl plugin!),

What's Changed

• Update pre-commit hooks by @pre-commit-ci[bot] in #537
• Fix fancy index item bug by @ykcUconn in #543
• feat: add support for .b2z, .b2d, .b2e files and update related tests by @bossbeagle1509 in #541
• Add none indexing for lazyudf/lazyarray by @lshaw8317 in #545
• Bump actions/download-artifact from 6 to 7 by @dependabot[bot] in #547
• Bump actions/upload-artifact from 5 to 6 by @dependabot[bot] in #548
• Update pre-commit hooks by @pre-commit-ci[bot] in #550
• PEP 639 compliance by @DimitriPapadopoulos in #552
• Multi-threaded reductions by @FrancescAlted in #549
• Implement PEP recommendations by @lshaw8317 in #560
• Add openzl_plugin support by @lshaw8317 in #559

New Contributors

• @ykcUconn made their first contribution in #543
• @bossbeagle1509 made their first contribution in #541

Full Changelog: v3.12.2...v4.0.0-b1

Blosc2 v3.12.2

What's Changed

• Hotfix to change WASM wheel hosting to separate repo

Blosc2 v3.12.1

What's Changed

• Allow saving of numba-decorated lazyudfs by @lshaw8317 in #538
• Automate upload of WASM wheels to GitHub pages

Blosc2 v3.12.0

What's Changed

• LazyUDF objects can now be saved to disk
• Calls to __matmul__ NumPy ufunc now passed to blosc2.matmul
• Streamlined LazyUDF.compute is now much more robust and functional
• The get_chunk method for LazyExpr is more efficient and enabled for general LazyArray objects
• LazyExpr calculation can now be done even with expressions with pure scalar operands, e.g 10 * 3 +1..

Full Changelog: v3.11.1...v3.12.0

Blosc2 3.11.1

What's Changed

✅ Change the NDArray.size to return the number of elements in array, instead of the size of the array in bytes
✅ Bug fixes for lazy expressions to allow a wider range of functionality
✅ Small bug fix for slice indexing with step larger than chunksize
✅ Tweak automatic chunk sizing of results for certain (e.g. linalg) operations to enhance performance
✅ Various cosmetic fixes and streamlining (thanks to the indefatigable @DimitriPapadopoulos)

Full Changelog: v3.11.0...v3.11.1

Blosc2 v3.11.0

What's Changed

• Small optimisation for chunking in lazy expressions
• Extend Blosc2 computation machinery to accept general array inputs (PR #510)
• Refactoring and streamlining of get/setitem for non-unit steps (PR #513)
• Remote array testing now performed with cat2cloud (PR #511)
• Added argmax/argmin functions (PR #514)
• Change squeeze to return view (rather than modify array in-place) (PR #518)
• Modify setitem to load general array inputs into NDArrays (PR #517)

Full Changelog: v3.10.2...v3.11.0

Release 3.10.2

Changes from 3.10.1 to 3.10.2

• LazyExpr.compute() now honors the out parameter for regular expressions (and not only for reductions). See PR #506.

Blosc2 v3.10.1

What's Changed

• Python 3.14 by @DimitriPapadopoulos in #504
• Minor pre-commit changes by @DimitriPapadopoulos in #505
• Optimisations and fixes for lazy expression evaluation
• Bumped requirement for numexpr to version 2.14.1 for improved tan/tanh overflow behaviour
• Now able to use blosc2 in AWS Lambda