René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Severe performance degradation for tracing under 3.11","articleBody":"\u003c!--\r\n  If you're new to Python and you're not sure whether what you're experiencing is a bug, the CPython issue tracker is not\r\n  the right place to seek help. Consider the following options instead:\r\n\r\n  - reading the Python tutorial: https://docs.python.org/3/tutorial/\r\n  - posting in the \"Users\" category on discuss.python.org: https://discuss.python.org/c/users/7\r\n  - emailing the Python-list mailing list: https://mail.python.org/mailman/listinfo/python-list\r\n  - searching our issue tracker (https://github.com/python/cpython/issues) to see if\r\n    your problem has already been reported\r\n--\u003e\r\n\r\n**Bug report**\r\n\r\nCoverage.py is seeing a significant increase in overhead for tracing code in 3.11 compared to 3.10: https://github.com/nedbat/coveragepy/issues/1287\r\n\r\nAs an example:\r\n\r\n| cov | proj | python3.10 | python3.11 | 3.11 vs 3.10 |\r\n|----|----|----|----|----|\r\n| none | bug1339.py | 0.184 s | 0.142 s | 76% |\r\n| none | bm_sudoku.py | 10.789 s | 9.901 s | 91% |\r\n| none | bm_spectral_norm.py | 14.305 s | 9.185 s | 64% |\r\n| 6.4.1 | bug1339.py | 0.450 s | 0.854 s | 189% |\r\n| 6.4.1 | bm_sudoku.py | 27.141 s | 55.504 s | 204% |\r\n| 6.4.1 | bm_spectral_norm.py | 36.793 s | 67.970 s | 184% |\r\n\r\n(This is the output of [lab/benchmark.py](https://github.com/nedbat/coveragepy/blob/master/lab/benchmark.py).)\r\n\r\n**Your environment**\r\n\r\n\u003c!-- Include as many relevant details as possible about the environment you experienced the bug in --\u003e\r\n\r\n- CPython versions tested on: 3.10, 3.11 \r\n- Operating system and architecture: MacOS, Intel\r\n\r\n\u003c!--\r\nYou can freely edit this text. Remove any lines you believe are unnecessary.\r\n--\u003e\r\n\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-108028\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/nedbat","@type":"Person","name":"nedbat"},"datePublished":"2022-06-05T12:21:38.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":61},"url":"https://github.com/93516/cpython/issues/93516"}