What is python-blosc?

Blosc ( is a high performance compressor optimized for binary data. It has been designed to transmit data to the processor cache faster than the traditional, non-compressed, direct memory fetch approach via a memcpy() OS call.

Blosc works well for compressing numerical arrays that contains data with relatively low entropy, like sparse data, time series, grids with regular-spaced values, etc.

This is a Python package that wraps it.

Mailing list

Discussion about this module is welcome in the Blosc list: