This blog post by Dan Crosta is interesting. It talks about how is possible to optimise Python code for operations that get called multiple times avoiding the usage of Object Orientation and using Closures instead.
While the “closures” gets the highlight, the main idea is a little more general. Avoid repeating code that is not necessary for the operation.
The difference between the first proposed code, in OOP way
and the last one
The main differences are that both the config dictionary and the methods (which are also implemented as a dictionary) are not accessed. We create a direct reference to the value (categories and mode) instead of making the Python interpreter search on the self methods over and over.
This generates a significant increase in performance, as described on the post (around 20%).
But why stop there? There is another clear win in terms of access, assuming that the…
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