Comment by perching_aix

Absolutely, no doubt about that. I just find it a terrible way to approach from in general, as well as specifically in this case: swapping out CPython with PyPy, GraalPy, Taichi, etc. - as per the post - requires no code changes, yet results in leaps and bounds faster performance.

If switching runtimes yields, say, 10x perf, and switching languages yields, say, 100x, then the language on its own was "just" a 10x penalty. Yet the presentation is "language is 100x slower". That's my gripe. And these are apparently conservative estimates as per the tables in the OP.

Not that metering "language performance" with numbers would be a super meaningful exercise to begin with, but still. The fact that most people just go with CPython does not escape me either. I do wonder though if people would shop for alternative runtimes more if the common culture was more explicitly and dominantly concerned with the performance of implementations, rather than of languages.