有人将如何在Python中对io.open（）进行基准测试？

Question

Let's say I want to see if reading a file using os.open() is actually faster than io.open() . I know that one returns a file descriptor and the other one returns an object, but the contents of a file can be read both ways (note that I'm interested in reading binary data ( b or os.O_BINARY ). Any thoughts?

Answer 1

https://docs.python.org/2/library/timeit.html is the usual way of doing these kind of microbenchmarks.

from timeit import timeit
timeit("f=os.open('testfile', os.O_RDONLY);os.read(f, 999);os.close(f)",
       setup="import os")

Should get you started. You may need to try with turning the garbage collector on and off and see if there's a difference too. But that's all documented in the timeit docs.