Reduce Qt for Python Binary Size

As we deploy your packages with each release, we have notice that adding a wrapper around the Qt binaries could be reduced, so this Story is to track the progress around it.

For a final goal, the team aims to get a 30% reduction in most of our wrappers.

Currente state 04.2024

In the case of QtCore (Linux), we deploy the Qt binary, which is:

6.8M    PySide6/Qt/lib/libQt6Core.so.6

and on top of that our wrapper:

4.4M    PySide6/QtCore.abi3.so

Meaning that only for providing QtCore compatibility, we need more than 10MB, which when deploying applications, this becomes a problem.

Ideas

There has been a few ideas on how to reduce the size, but it's probable that other will appear as well, for example:

• Identifying common bound methods signatures (say void(int)) and create library code to handle it instead of verbosely generating the code
• Removal of the strings we have within the wrapper (signatures)
• exporting only a few symbols when generating the wrapper
• Reducing the generated code by some sections, or improving processes
• etc