ulab is a numpy-like array manipulation library for micropython. The module is written in C, defines compact containers for numerical data, and is fast.
Documentation can be found under https://micropython-ulab.readthedocs.io/en/latest/ The source for the manual is in https://github.com/v923z/micropython-ulab/blob/master/docs/ulab-manual.ipynb, while developer help is in https://github.com/v923z/micropython-ulab/blob/master/docs/ulab.ipynb.
Firmware for pyboard.v.1.1 is updated once in a while, and can be downloaded from https://github.com/v923z/micropython-ulab/releases, otherwise, it can be compiled from the source by following the steps https://micropython-usermod.readthedocs.io/en/latest/usermods_05.html#compiling-our-module.