https://github.com/python/cpython/commit/3df0c4da4c502a4e26ed00468dd97aa50a3bb260 commit: 3df0c4da4c502a4e26ed00468dd97aa50a3bb260 branch: main author: Tim Peters <[email protected]> committer: tim-one <[email protected]> date: 2026-04-06T23:08:47-05:00 summary:
Note out-of-date obmalloc comments (#148149) Vladimir's original overviews, from 1998, are still good, but going on 30 years later details have changed. Note that, but rather try to keep up with moving targets in a different file, point to sys._debugmallocstats() as the sure way to discover precise current details. No code changes, just added a block comment. Co-authored-by: Bartosz Sławecki <[email protected]> files: M Include/internal/pycore_obmalloc.h diff --git a/Include/internal/pycore_obmalloc.h b/Include/internal/pycore_obmalloc.h index d4dbe541e6da51..f6b4bd90a23455 100644 --- a/Include/internal/pycore_obmalloc.h +++ b/Include/internal/pycore_obmalloc.h @@ -14,6 +14,12 @@ typedef unsigned int pymem_uint; /* assuming >= 16 bits */ #undef uint #define uint pymem_uint +/* NOTE: the following overviews were in the initial checkin, in 1998. In + * 2026, they're still helpful, but some details have changed. For example, + * we now use 32 size classes 16 bytes apart, and an arena is generally at + * least 1MB. Use sys._debugmallocstats() to see exact current details for + * the specific version of CPython used. + */ /* An object allocator for Python. _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3//lists/python-checkins.python.org Member address: [email protected]
