pitrou commented on code in PR #500:
URL: https://github.com/apache/arrow-site/pull/500#discussion_r1601703998
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_posts/2024-04-20-16.0.0-release.md:
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+---
+layout: post
+title: "Apache Arrow 16.0.0 Release"
+date: "2024-04-20 00:00:00"
+author: pmc
+categories: [release]
+---
+<!--
+{% comment %}
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements. See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to you under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License. You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+{% endcomment %}
+-->
+
+
+The Apache Arrow team is pleased to announce the 16.0.0 release. This covers
+over 3 months of development work and includes [**385 resolved issues**][1]
+on [**586 distinct commits**][2] from [**119 distinct contributors**][2].
+See the [Install Page](https://arrow.apache.org/install/)
+to learn how to get the libraries for your platform.
+
+The release notes below are not exhaustive and only expose selected highlights
+of the release. Many other bugfixes and improvements have been made: we refer
+you to the [complete changelog][3].
+
+## Community
+
+Since the 15.0.0 release, Jeffrey Vo, Jay Zhan, Bryce Mecum, Joel Lubinitsky,
+and Sarah Gilmore have been invited to be committers.
+No new members have joined the Project Management Committee (PMC).
+
+Thanks for your contributions and participation in the project!
+
+## C Data Interface notes
+
+- Added `RegisterDeviceMemoryManager` and `GetDeviceMemoryManage` for managing
mappings between a device type and id to a memory manager
([GH-40698](https://github.com/apache/arrow/issues/40698)).
+- Added `RegisterCUDADevice` to register CUDA devices
([GH-40698](https://github.com/apache/arrow/issues/40698)).
+- Added `ImportFromChunkedArray` and `ExportChunkedArray` for handling Chunked
Arrays in the C Stream Interface
([GH-38717](https://github.com/apache/arrow/issues/38717)).
+- Fixed an issue where string and nested types weren’t being correctly
imported with DeviceArray
([GH-39769](https://github.com/apache/arrow/issues/39769)).
+- Added support for copying Arrays and RecordBatches between memory types
([GH-39771](https://github.com/apache/arrow/issues/39771)).
+
+## Arrow Flight RPC notes
+
+- Session variable RPCs were added
([GH-34865](https://github.com/apache/arrow/issues/34865))
+- Go: cookies can be copied to another connection to reuse existing
credentials ([GH-39837](https://github.com/apache/arrow/issues/39837))
+- Go: enable PollFlightInfo for Flight SQL clients/servers
([GH-39574](https://github.com/apache/arrow/issues/39574))
+- Java: the JDBC driver now tries all locations the server sends it
([GH-38573](https://github.com/apache/arrow/issues/38573))
+- Java: tweak some options to give better performance
([GH-40475](https://github.com/apache/arrow/issues/40745),
[GH-40039](https://github.com/apache/arrow/issues/40039))
+
+## C++ notes
+For C++ notes refer to the full changelog.
+
+## Highlights
+
+- Initial support for the Azure Blob Storage has been added
([GH-18014](https://github.com/apache/arrow/issues/18014)).
+- Arrow C++ can now be built with Emscripten
([GH-37821](https://github.com/apache/arrow/pull/37821)) which lays the
foundation for running Arrow C++ under WASM runtimes and eventually
[PyArrow](https://github.com/apache/arrow/pull/37822) as well.
+- Arrow's filesystem modules have been separated out into individual libraries
and this change enables writing and registering custom filesystem
implementations ([GH-38309](https://github.com/apache/arrow/issues/38309)).
+- Conversion from `Table` and `RecordBatch` to a `Tensor` (not the same as
+[tensor extension
array](https://arrow.apache.org/docs/dev/format/CanonicalExtensions.html#official-list))
+is being developed. Umbrella issue is created
([GH-40058](https://github.com/apache/arrow/issues/40058))
+and issues connected to the `RecordBatch` conversion are included in this
release
+([GH-40059](https://github.com/apache/arrow/issues/40059),
+[GH-40357](https://github.com/apache/arrow/issues/40357),
+[GH-40297](https://github.com/apache/arrow/issues/40297),
+[GH-40060](https://github.com/apache/arrow/issues/40060),
+[GH-40061](https://github.com/apache/arrow/issues/40061) and
+[GH-40866](https://github.com/apache/arrow/issues/40866)) which means
`RecordBatch` can now be
+converted to a column or row-major two-dimensional structure.
+
+## Breaking Changes
+
+- `Function::is_impure` has been renamed to `is_pure`
([GH-40607](https://github.com/apache/arrow/issues/40607)).
+
+## Compute
+
+### Bug Fixes
+
+- Fixed a potential crash when accessing the `true_count` property on a
BooleanArray ([GH-41016](https://github.com/apache/arrow/issues/41016)).
+
+### Performance improvements
+
+- Significantly improved performance of the take kernel on certain types of
inputs ([GH-40207](https://github.com/apache/arrow/issues/40207)).
+
+### Enhancements
+
+- Support for casting to and from half-float (float16) has been added
([GH-20213](https://github.com/apache/arrow/issues/20213)).
+- Added support for residual predicates to Swiss Join implementation
([GH-20339](https://github.com/apache/arrow/issues/20339)).
+- Expanded support to primitive filter implementation for all fixed-width
primitive types and take filter implementation for all well-known fixed-width
types ([GH-39740](https://github.com/apache/arrow/issues/39740)).
+- Added support for calling the `binary_slice` kernel on Fixed-Size Binary
Arrays ([GH-39231](https://github.com/apache/arrow/issues/39231)).
+- The cast kernel now supports casting from LargeString, Binary, and
LargeBinary to Dictionary
([GH-39463](https://github.com/apache/arrow/issues/39463)).
+- Fields of different decimal precision can now be used together in arithmetic
operations without an explicit cast beforehand.
([GH-40126](https://github.com/apache/arrow/issues/40126)).
+
+## Datasets
+
+- Improved backpressure handling in the Dataset Writer which can significantly
reduce memory usage for some use cases
([https://github.com/apache/arrow/pull/40722](https://github.com/apache/arrow/pull/40722)).
+
+## Parquet
+
+- Byte stream split encoding support has been added for FIXED_LEN_BYTE_ARRAY,
INT32, and INT64 which enables this encoding for half-float (float16) and
fixed-width decimal ([GH-39978](https://github.com/apache/arrow/issues/39978)).
+- Decoding boolean values has been made faster for a variety of cases
([GH-40872](https://github.com/apache/arrow/issues/40872)).
+
+## Filesystems
+
+### New Features
+
+- In addition to building the individual filesystem implementations as
separate modules, users can now write and register custom filesystem
implementations ([GH-38309](https://github.com/apache/arrow/issues/38309)).
+- A new environment variable, `AWS_ENDPOINT_URL_S3`, has been added which
allows separately overriding the endpoint for S3 operations alone
([GH-38663](https://github.com/apache/arrow/issues/38663)).
+
+### Bug Fixes
+
+- Fixed a bug in the S3 filesystem implementation that could cause a crash
when deleting an object having duplicate forward slashes in its name
([GH-38821](https://github.com/apache/arrow/issues/38821)).
+- Fixed a bug where `hash_mean` could silently overflow
([GH-38833](https://github.com/apache/arrow/issues/38833)).
+
+### Improvements
+
+- The S3 implementation now sets the content-type of directory-like objects to
application/x-directory to improve compatibility with other S3 tools
([GH-38794](https://github.com/apache/arrow/issues/38794)).
+- Repeated S3Client initialization is now roughly an order of magnitude faster
([GH-40299](https://github.com/apache/arrow/pull/40299)).
+- The MemoryPoolStats implementation has been reworked to re-order loads and
stores which may be an improvement for some allocation-heavy, multi-threaded
applications ([GH-40783](https://github.com/apache/arrow/issues/40783)).
+
+### Substrait
Review Comment:
"Substrait" should not be under "Filesystems" but at the same level.
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