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+--- Thread: Why does Cython generates bad code for Gentoo? (/thread-23352.html)
Why does Cython generates bad code for Gentoo? - AlekseyPython - Dec-24-2019
Kubuntu 19.10 / Gentoo
I wrote a Python- program, that uses a small computational core, written with a Cython. Having tested on Kubuntu and Gentoo, I found that pure Python code (without a computational core) runs faster on a Gentoo (~+33%), but the Cython computational core runs about 1.5 times faster on a Kubuntu. As a result, the entire program runs faster on a Kubuntu.
I tried to transfer various combinations of options in a pyx- files:
# distutils: extra_compile_args = ["- O2", "-march = haswell", "-ftree-vectorize"], but this does not improve the speed of the Cython- code on a Gentoo.
How to speed up work of my program on a Gentoo?
RE: Why does Cython generates bad code for Gentoo? - AlekseyPython - Dec-26-2019
Moreover, adding the -O2 option improved the performance, but not enough (i.e. these settings affect the performance).