This is the release note of v4.4.0. See here for the complete list of solved issues and merged PRs.

New Features

• Add divmod function to cupy namespace (#1480)
• Allow more natural fusion notation (#1481)

Enhancements

• Avoid collections.sequence (#1472)
• Support negative indices in array_split (#1475)
• Avoid variable name l to follow pep8 (#1479)
• Reduce Python function call in ElementwiseKernel (#1482)
• Speed up ElementwiseKernel launch (#1488)
• Improve memory allocation performance (#1490)
• Fix type of return value of fused function (#1491)
• Support composition of fused functions (#1494)
• Add compilation methods in Fusion class (#1497)
• Allow cupy.get_array_module take fusion parameters (#1498)
• Use CScalar in elementwise and reduction (#1508)
• Use collections.abc to avoid DeprecationWarning in Python 3.7 (#1517)
• Fix unit test errors in NumPy 1.15 (#1549)

Bug Fixes

• Use cython.no_gc to avoid memory leak (#1474)
• Fix errors on 0-sized inputs (#1485)
• Fix type of reduction (#1502)
• Avoid compile error in old GCC (CentOS6) (#1516)
• Fix thrust memory allocation problem (#1525)
• Fix dtype order of create_comparison (#1553)
• Raise error when trying to broadcast out_params in ElementwiseKernel (#1556)

Documentation

• Add upgrade guide for cupyx namespaces (#1496)
• Update agnostic code tutorial (#1528, thanks @w-m!)

Tests

• Add .pytest_cache/ to .gitignore (#1530)
• Avoid hacking: Use the same test settings as Chainer (#1536)