[BerislavLopac]

> I'm almost sure the python developers said that they will compensate the slow down with other optimizations

Those optimisations are not there to compensate anything; they will improve performance of single-threaded code with or without GIL.

[emblaegh]

That I meant to express yes. That those non-GIL-related optimizations would soften the blow of any slowdown from the GIL removal project.

[BerislavLopac]

Maybe, but making GIL optional (rather than removing it completely) solves both problems.

[emblaegh]

I however creates another, arguably bigger problem, it fragments the ecosystem.