Edit: the problems in this review seem to have been addressed as of version 0.12. I'm leaving the review text here for the time being.
* STALE REVIEW FOLLOWS
This module offers an interface to Facebook's new Zstandard compression library based on the new asymmetric numeral compression algorithms of Jarek Duda. It incorporates the Zstandard libraries into the module, which means that you don't have to download any third-party libraries to install this. It should be a great contribution, but I have to say I'm frustrated by this module.