What's the difference between 'import module' and 'from module import ...' considering performance?

Question

What is recommended? Which one should be used more often? What does it depend on? How to decide...

Answer 1

The difference is that "from <module/file> import <class/module>" is used for importing some specific thing from that file/module. In the other hand "Import<module> is used for importing the whole module/file.

Answer 2

Thanks Aryan Sarpal, but what I meant is how it impacts the performance of the program. Do you know?

Edit: I assume that if you use huge modules, it's better to avoid loading them all into the program. But I'm not sure, so I asked

Answer 3

Hi Orville Vroemen,
the performance will impact while running the file but it might be that when you are using the "from import" one the class/module you are importing might be that it needs the whole module to run that part of the module. So it matters where and when you need what.