HDFGroup/hdf5 hdf5_1.14.4.3

HDF5 Release 1.14.4.3

on GitHub

HDF5 version 1.14.4-3 released on 2024-05-22

This is a maintenance release with a few changes and updates:

• Fixed a leak of datatype IDs created internally during datatype conversion

  Fixes h5py GitHub h5py/h5py#2419

• Added support for _Float16 16-bit floating-point datatype

  Support for the 16-bit floating-point _Float16 C type has been added to
  HDF5. On platforms where this type is available, this can enable more
  efficient storage of floating-point data when an application doesn't
  need the precision of larger floating-point datatypes. It can also allow
  for improved performance when converting between 16-bit floating-point
  data and data of another HDF5 datatype.

• Improved type conversion performance

  As a part of the _Float16 work, the type conversion code was overhauled,
  which has improved the performance of type conversion code. The speedup
  varies depending on the datatypes involved, but can be upwards of 10x
  for compound types and 100x when converting floats to integers where the
  library doesn't have a fast conversion path available from the compiler.

• Added improvements for cloud-optimized HDF5

  As a part of our continued push to improve access to HDF5 files stored in the
  cloud, we've added a few things to make working with cloudy HDF5 files more
  efficient:

  • Page buffering setup is now more tolerant of being used with HDF5 files
    that did not use paged storage. This avoids having to open/close/re-open
    the file to determine appropriate page buffering settings.

  • Added support for temporary credentials with the read-only S3 VFD

• Added build system improvements

  We are always working to ensure that HDF5 can be built on a wide variety of
  systems with the latest compilers. In this release, we've incorporated some
  improvements, including:

  • Further improvements to cross-compiling
  • Support for the new standards-compliant MSVC preprocessor
  • Better support for Cygwin and MinGW, particularly with the Autotools
  • Many other build system tweaks

  If you have a system that has problems building HDF5, please let us know on
  the HDF Group Forum (https://forum.hdfgroup.org/)

• Fixed many CVE issues

  Many soon-to-be-reported CVE issues were fixed in this release. These are
  similar to previously reported CVE issues in that they involve file parsing
  errors that generally result in a segfault. They are usually rated as
  medium severity by NIST. These issues do not have official CVE numbers yet.

  With these fixes, HDF5 will once again be CVE-free.

• The release tag in GitHub will be hdf5_1.14.4.3

  We used to use tags with names like hdf5-1_14_3, but we've been informed
  that dashes are forbidden in version strings by many package management
  schemes. If a patch release is necessary, we'll simply append another
  dot and number - e.g. hdf5_1.14.4.3 (instead of our previous hdf5-1_14_4-3).

• Many other improvements and bugfixes!

  Please see the full release notes for detailed information regarding this
  release, including a detailed list of changes.