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| author | Eric Snow <ericsnowcurrently@gmail.com> | 2022-01-12 23:28:46 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-01-12 23:28:46 (GMT) |
| commit | ed57b36c32e521162dbb97199e64a340d3bff827 (patch) | |
| tree | fab825ae903723e4dc748e7b89cb78f3b226c816 /Misc | |
| parent | 0bbf30e2b910bc9c5899134ae9d73a8df968da35 (diff) | |
| download | cpython-ed57b36c32e521162dbb97199e64a340d3bff827.zip cpython-ed57b36c32e521162dbb97199e64a340d3bff827.tar.gz cpython-ed57b36c32e521162dbb97199e64a340d3bff827.tar.bz2 | |
bpo-45953: Statically allocate the main interpreter (and initial thread state). (gh-29883)
Previously, the main interpreter was allocated on the heap during runtime initialization. Here we instead embed it into _PyRuntimeState, which means it is statically allocated as part of the _PyRuntime global. The same goes for the initial thread state (of each interpreter, including the main one). Consequently there are fewer allocations during runtime/interpreter init, fewer possible failures, and better memory locality.
FYI, this also helps efforts to consolidate globals, which in turns helps work on subinterpreter isolation.
https://bugs.python.org/issue45953
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS.d/next/Core and Builtins/2021-12-01-11-54-27.bpo-45953.2znR0E.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Misc/NEWS.d/next/Core and Builtins/2021-12-01-11-54-27.bpo-45953.2znR0E.rst b/Misc/NEWS.d/next/Core and Builtins/2021-12-01-11-54-27.bpo-45953.2znR0E.rst new file mode 100644 index 0000000..4fa27b6 --- /dev/null +++ b/Misc/NEWS.d/next/Core and Builtins/2021-12-01-11-54-27.bpo-45953.2znR0E.rst @@ -0,0 +1,4 @@ +The main interpreter in _PyRuntimeState.interpreters is now statically +allocated (as part of _PyRuntime). Likewise for the initial thread state of +each interpreter. This means less allocation during runtime init, as well +as better memory locality for these key state objects. |