Improving Flask performance by hinting the Python GC about unreachable cycles

[omripalmon]

have recently tried to convince the Python community to add a feature to the Python GC which would accept hints that a certain group of objects is unreachable and can be deallocated. Such a feature would reduce the amount of time spent in full memory scan and improve P99 latency. The actual hints can be provided by developers or Claude Code.

See https://discuss.python.org/t/improving-python-garbage-collection-performance-by-providing-unreachable-cycles-hints/108307 for more details.

I need to test this first on a large scale complex Python environment, and Flask seems perfect for this. Can anyone from the Flask team with me on this? I can code the feature, but I will need a real-life environment to see the actual performance gain. If we can show definite improvement we can use it to push this feature to the Python team.

[davidism]

No, this is not something we can help with.