Why is the Alpine Docker image over 50% slower than the Ubuntu image?

I noticed that my Python application is much slower when running it on python:2-alpine3.6 than running it without Docker on Ubuntu. I came up with two small benchmark commands and there's a huge difference visible between the two operating systems, both when I'm running them on an Ubuntu server, and when I'm using Docker for Mac. $ BENCHMARK="import timeit; print(timeit.timeit('import json; json.d

[kiririmode]

muslとglibcの結果比較。サンプル数は少ない。コメントも参照。