Guido's on record as having three "political" requirements for any GIL-less Python: 1. Same or better performance 2. No breaking existing extensions 3. Not ove

Guido's on record as having three "political" requirements for any GIL-less Python: 1. Same or better performance 2. No breaking existing extensions 3. Not overly-complicating the cpython implementation These are tough requirements, but obviously sensible, and Hasting's discussion of trying to meet them is interesting.