My understanding is most low hanging fruit were picked for Python 3.11. And the faster CPython team have been looking at more mid to long term goals with the addition of a JIT and other accompanying infrastructure around for 3.13 and 3.14.
However, the recent no-GIL decision I think has sent a few things back to the drawing board to see what can and cannot be salvaged from their progress and plans so far.
They use the `pyperformance` package[0] that, according to the readme, use real world scenarios. So I expect it to capture every significant improvement.
I wonder if the original 500% improvement they targeted at the start of the `faster cpython` project is still a realistic target.
[0] https://github.com/faster-cpython/benchmarking-public