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Re:On average, Python in GraalVM is 8.92x faster than CPython by Youden on Wednesday November 03, 2021 @03:59PM (#29099549)
I think you're misreading. PyPy isn't half as fast, it takes half the time.

They point out that the geometric mean is 0.22, so PyPy is 4.5x faster.

Re:On average, Python in GraalVM is 8.92x faster than CPython by Rochus on Wednesday November 03, 2021 @04:48PM (#29100070)
> so PyPy is 4.5x faster.

Yes, than CPython, but I was talking about Graal Python; I would like to know what benchmarks they used and how they calculated the speedup factor.