New submission from STINNER Victor <vstin...@python.org>:
Measure using this script on the main branch (commit 108e66b6d23efd0fc2966163ead9434b328c5f17): --- import _testcapi def f(): yield _testcapi.stack_pointer() print(_testcapi.stack_pointer() - next(f())) --- Stack usage depending on the compiler and compiler optimization level: * clang -O0: 9,104 bytes * clang -Og: 736 bytes * gcc -O0: 6,784 bytes * gcc -Og: 624 bytes -O0 allocates around 10x more memory. Moreover, "./configure --with-pydebug CC=clang" uses -O0 in CFLAGS, because "clang --help" output doesn't containt "-Og". I'm working on a configure change to use -Og on clang which supports it. ---------- components: Build messages: 412252 nosy: vstinner priority: normal severity: normal status: open title: Python built with clang -O0 allocates 10x more stack memory than clang -O3 on a Python function call type: performance versions: Python 3.11 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue46600> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
