ANN: C-Blosc2 2.23.1 is out!

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Francesc Alted

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Mar 5, 2026, 6:47:30 AM (8 days ago) Mar 5
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# Announcing C-Blosc2 2.23.1
A fast, compressed and persistent binary data store library for C.

## What is new?

This is a patch level release which fixes some memory leaks/undefined
behaviour, as well as allowing resizing of empty arrays and the use of meta
(interpreted as number of bytestreams) for the byteshuffle filter.

For more info, see the release notes in:

https://github.com/Blosc/c-blosc2/blob/main/RELEASE_NOTES.md

## What is it?

Blosc2 is a high-performance data container optimized for binary data.
Blosc2 is the next generation of Blosc, an [award-winning]
(https://www.blosc.org/posts/prize-push-Blosc2) library that has been
around for more than a decade.

Blosc2 expands the capabilities of Blosc by providing a higher level
container that is able to store many chunks on it (hence the super-block name).
It supports storing data on both memory and disk using the same API.
Also, it adds more compressors and filters.

## Download sources

The github repository is over here:

https://github.com/Blosc/c-blosc2

Blosc is distributed using the BSD license, see LICENSE.txt
for details.

## Mailing list

There is an official Blosc mailing list at:

bl...@googlegroups.com
https://groups.google.com/g/blosc

## Fosstodon feed

Please follow https://fosstodon.org/@Blosc2 to get informed about the latest developments.


Enjoy Data!
- The Blosc Development Team

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