Zstandard is a real-time compression algorithm, providing high
compression ratios. It offers a very wide range of compression / speed
trade-off, while being backed by a very fast decoder. Zstandard library
is provided as open source software using a BSD license.
In attachment you can find an implementation of Zstd HDF5 gilter
plug-in. My tests confirm the good properties of Zstd compression, even
on small chunks.