New submission from STINNER Victor: Attached patch reduce C stack consumption in function calls. It's the follow-up of the issue #28870.
Reference (rev a30cdf366c02): test_python_call: 7175 calls before crash, stack: 1168 bytes/call test_python_getitem: 6235 calls before crash, stack: 1344 bytes/call test_python_iterator: 5344 calls before crash, stack: 1568 bytes/call => total: 18754 calls, 4080 bytes With "Inline call_function() in ceval.c": test_python_call: 7936 calls before crash, stack: 1056 bytes/call test_python_getitem: 6387 calls before crash, stack: 1312 bytes/call test_python_iterator: 5755 calls before crash, stack: 1456 bytes/call => total: 20078 calls, 3824 bytes With inline and "_PY_FASTCALL_SMALL_STACK: 5 arg (40 B) => 3 arg (24 B)": test_python_call: 8058 calls before crash, stack: 1040 bytes/call test_python_getitem: 6630 calls before crash, stack: 1264 bytes/call test_python_iterator: 5952 calls before crash, stack: 1408 bytes/call => total: 20640 calls, 3712 bytes I applied testcapi_stack_pointer.patch and run stack_overflow_28870-sp.py of the issue #28870 to produce these statistics. With the patch, Python 3.7 is still not as good as Python 3.5 (msg285109), but it's a first enhancement. ---------- components: Interpreter Core files: less_stack.patch keywords: patch messages: 285135 nosy: haypo, serhiy.storchaka priority: normal severity: normal status: open title: Reduce C stack consumption in function calls type: performance versions: Python 3.7 Added file: http://bugs.python.org/file46242/less_stack.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29227> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
