Of course. It's clearly visible e.g. on https://speed.pypy.org/ https://speed.pypy.org/ that it doesn't show equal performance on all benchmarks. The factor fou

Of course. It's clearly visible e.g. on https://speed.pypy.org/ https://speed.pypy.org/ that it doesn't show equal performance on all benchmarks. The factor four corresponds to the geometric mean of all benchmarks. And as you say there are benchmarks where it even performs slower than CPython.