This is the release note of v10.0.0b3. See here for the complete list of solved issues and merged PRs.

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Highlights

Array API initial support (#5698)

This release starts implementing the Array API standard for interoperability with other tensor libraries. Please check the CuPy documentation to see a list of the currently available features.

Changes without compatibility

Drop support for CUDA 10.1 or earlier (#5770)

As per the RFC in #5717 and twitter, the minimum CUDA version that will be supported by CuPy v10 is CUDA 10.2.

Drop support for Python 3.6 (#5771)

Following the Python 3.6 sunset on December 2021, and the compatibility lines with NumPy, starting CuPy v10, Python 3.6 will no longer be supported.

Alpha/Beta/RC wheels no longer distributed through PyPI

• As per the discussion in #5671, we stopped uploading pre-release binary wheels to PyPI for the health of the ecosystem. Pre-release wheels can now be downloaded from the recently introduced custom index (e.g., pip install cupy-cudaXXX -f https://pip.cupy.dev/pre) . Note that the sdist package is available in PyPI for all versions.

• Outdated (v8.0.0rc1 or earlier) pre-release binaries have been removed from PyPI. See #5667 for details.

Changes

New Features

• Add binomial distribution to new Generator (#5429)
• Adopt the numpy.array_api module as cupy.array_api (#5698)

Enhancements

• Improve stream mismatch error message (#5706)
• Support cuDNN 8.2.4 (#5726)
• Support NCCL 2.11.4 (#5734)
• Fix cupyx.optimize to save file when no optimization ran (#5757)
• Adding bitorder support to cupy.unpackbits (#5765)
• Drop support for CUDA 10.1 or earlier (#5770)
• Drop support for Python 3.6 (#5771)

Bug Fixes

• Fix spline filter with large array (#5673)
• Fix exception for indexing with multiple ellipses (#5718)
• Fix docstring for fallback modules (#5728)
• Fix MAX_NDIM and add guards/tests (#5749)
• Fixed typo in error message in sparse.csr_matrix (#5767)
• Include stdexcept in hip headers (#5769)
• Disable spmm on Windows CUDA 10.2 (#5802)

Code Fixes

• Prefix Cython compile_time_env with CUPY_ (#5740)

Documentation

• Use custom index for pre-release wheels (#5772)
• Remove --pre from ROCm source build instructions (#5773)

Installation

• Reorganize build scripts, part 1 (#5730)
• Reorganize build scripts, part 2: separate modules (#5743)
• Reorganize build scripts, part 3: simplify setup.py (#5745)
• Reorganize build scripts, part 4: remove global cupy_setup_options (#5754)
• Reorganize build scripts, part 5: remove Cython version check (#5755)
• Add maintainers in setup.py (#5756)
• Bump version to v10.0.0b3 (#5807)

Tests

• Make testing helpers support non-methods (#5594)
• Stop inheriting unittest.TestCase for performance (#5599)
• Eliminate random test ids (#5659)
• Improve performance of TestSplineFilter1dLargeArray (#5693)
• TestSplineFilter1dLargeArray marked slow and reduced memory usage (#5724)
• Make test parameter names static (#5727)
• Update pip and setuptools in Windows CI (#5735)
• Improve FlexCI output (#5786)
• Skip tests for bug cases (FFT on CUDA 10.2 + Pascal) (#5791)
• Fix error message comparison (#5799)
• Fix test skip issue (#5801)

Others

• Update auto-notify bot for array-api label (#5725)
• Fix backport trigger (#5741)
• Add workflow to test/build/push docker images on pull-request/release (#5746)

Contributors

The CuPy Team would like to thank all those who contributed to this release!

@christinahedges @emcastillo @iskode @kmaehashi @leofang @povinsahu1909 @takagi @toslunar