Python built with clang -O0 allocates 10x more stack memory than clang -O3 on a Python function call

vstinner

BPO	46600
Nosy	@vstinner, @methane, @corona10, @pablogsal
PRs	bpo-46600: ./configure --with-pydebug uses -Og with clang #31052 bpo-46600: Fix test_gdb.test_pycfunction() for clang -Og #31058
Files	stack_overflow-4.py

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2022-02-01.13:06:00.875>
labels = ['3.11', 'build', 'performance']
title = 'Python built with clang -O0 allocates 10x more stack memory than clang -O3 on a Python function call'
updated_at = <Date 2022-02-03.00:00:28.611>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2022-02-03.00:00:28.611>
actor = 'methane'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Build']
creation = <Date 2022-02-01.13:06:00.875>
creator = 'vstinner'
dependencies = []
files = ['50600']
hgrepos = []
issue_num = 46600
keywords = ['patch']
message_count = 14.0
messages = ['412252', '412253', '412254', '412255', '412256', '412258', '412260', '412261', '412278', '412286', '412294', '412334', '412348', '412407']
nosy_count = 4.0
nosy_names = ['vstinner', 'methane', 'corona10', 'pablogsal']
pr_nums = ['31052', '31058']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'performance'
url = 'https://bugs.python.org/issue46600'
versions = ['Python 3.11']