python3.5 on docker alpine is slower than docker ubuntu

[folowing]

ubuntu 14.04 trusty image benchmark:

# python3 -c 'from test import pystone; pystone.main()'
Pystone(1.2) time for 50000 passes = 0.569234
This machine benchmarks at 87837.3 pystones/second

alpine 3.5 image benchmark:

# python3 -c 'from test import pystone; pystone.main()'
Pystone(1.2) time for 50000 passes = 0.715449
This machine benchmarks at 69886.2 pystones/second

[casperdcl]

Seems likely due to musl versus glibc:

https://superuser.com/questions/1219609/why-is-the-alpine-docker-image-over-50-slower-than-the-ubuntu-image