slothai/numpy repository overview

⁠Alpine Docker container with NumPy and OpenBLAS

In order to support OpenBLAS⁠ in NumPy⁠, one need to manually build it⁠ from source using site.cfg config.

⁠Container breakdown

• 30.5Mb Official Python Alpine-based image⁠.
• 10.8Mb OpenBlas⁠ /opt/OpenBLAS dependency.
• 58.0Mb = 32.9Mb NumPy + 21.9Mb gfortran⁠ + misc.

⁠Notes

• Use parallel build python setup.py build --parallel=$(nproc), it saves ~70% of time.
• In order to pass C flags to python use CFLAGS="-Ofast". It overrides original settings, see documentation⁠.
• NumPy is installed to /usr/local/lib/python3.6/site-packages/.

⁠Links

• What is the relation between BLAS, LAPACK and ATLAS⁠ @StackOverflow.
• Numerical Linear Algebra Packages on Linux⁠: BLAS, LAPACK, ATLAS.
• BLAS, LAPACK, CLAPACK, LAPACKE, ATLAS, OpenBLAS tutorials in C⁠.