I wrote a small review of this great and well written Python book "Fast Python - master the basics to write faster code" by Chris Conlan.

I really enjoyed reading it and learned a few thinks while during it. Therefore, I recommend it to anyone who is interested in this topic.

Python provides two different ways to create a dictionary: dict() and {}.

I prefer dict() when creating empty dictionaries to improve readability.

In this post, I want to check the performance across different usages and not only initialization.

The built-in functions all() and any()are nice and if the comparison is small, they are easy understandable. But how do they perform? Should we use them at all if our code needs to be fast?

Let me share my findings when I did some performance tests.