René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Split long running test suites up into smaller sub suites to reduce our regrtest long tail on multi-core systems.","articleBody":"The slowest tests of the Python test suite are:\r\n\r\n* test_concurrent_futures\r\n* test_multiprocessing_spawn\r\n* test_peg_generator\r\n* test_tools.test_freeze tests\r\n\r\nThey each tend take multiple minutes to run.  The bulk of our others take \u003c10 seconds.  They occupy a lot of wall time as a long tail in a normal make test or regrtest run on a typical parallel run multi-core systems.\r\n\r\nThis bug originally proposed to skip them unless the \"cpu\" resource is enabled (it's disabled by default). That was deemed appropriate for `test_peg_generator` and `test_tools.test_freeze` which are either not platform specific or rarely needed in CI.  (PR #108386) - This PR reduced the total test duration between **3** and **5** minutes.\r\n\r\n\u003c!-- gh-linked-prs --\u003e\r\n### Linked PRs\r\n* gh-108389\r\n* gh-108391\r\n* gh-108393\r\n* gh-108396\r\n* gh-108397\r\n* gh-108401\r\n* gh-108442\n* gh-108443\n* gh-109688\n* gh-109704\n\u003c!-- /gh-linked-prs --\u003e\r\n","author":{"url":"https://github.com/vstinner","@type":"Person","name":"vstinner"},"datePublished":"2023-08-23T23:05:39.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/108388/cpython/issues/108388"}