API for outputting different formats from CPython sampling profiler

Feature or enhancement

Proposal:

CPython 3.15 has statistical sampling profiler which currently only supports outputting

1. pstats https://docs.python.org/3.15/library/profile.html#pstats.Stats
2. collapsed format for flamegraphs https://github.com/python/cpython/blob/8d5c3341c538cd1a4192ca8a1536b2eed4b98c69/Lib/profiling/sampling/stack_collector.py#L24

Since it's still an early stage for the sampling profiler, I thought it would be nice to initiate discussion around how to support multiple different formats from the profiler.

1. pprof
2. OTel

are the formats that could potentially be added, but supporting those from CPython would introduce dependencies that might complicate building/testing and distributing CPython.

I'd like to suggest that CPython has an interface to support 3rd party collectors. What do you think?

Has this already been discussed elsewhere?

I have already discussed this feature proposal on Discourse

Links to previous discussion of this feature:

https://discuss.python.org/t/pre-pep-api-for-outputting-different-formats-from-cpython-sampling-profiler/103490

まず Lib/profiling/sampling/stack_collector.py と、issue で参照されている既存の pstats および collapsed-format の処理を読んでください。サードパーティ製 collector のインターフェースを提案する前に、リンク先の Discourse の議論を確認してください。完了とするには、合意された API、サポートする形式の境界、および CPython のビルド、テスト、配布に関する制約への対応計画が必要です。