This is not the release you’re looking for… (unless you’re looking for 3.12.7.) Because no plan survives contact with reality, instead of the actual Python 3.13.0 release we have a new Python 3.13 release candidate today. Python 3.13.0rc3 rolls back the incremental cyclic garbage collector (GC), which was added in one of the alpha releases. The incremental GC had more significant performance regressions in specific workloads than we expected. Rather than try to fiddle with its details in the ho...