René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Combine dataclass exec calls","articleBody":"# Feature or enhancement\r\n\r\n### Proposal:\r\n\r\n[As mentioned here](https://discuss.python.org/t/improving-dataclasses-startup-performance/15442/18), dataclass definition can possibly be sped up by combining the multiple `exec` calls into one.\r\n\r\nI have two versions, and I found that this results in either a 1.1-1.22 ~~1.26, or 1.37 speedup versus main~~ (old time / new time)\r\n\r\n~~[version 1](https://github.com/python/cpython/commit/e7c42bd21cf0f12ebfd88744dfde70b78877b1ac) combines the exec calls by passing a list of name/txt/locals from each function definition.\r\n[version 2](https://github.com/python/cpython/commit/10a72b7621b4a6580db1b29d15f259109a701c08) simplifies the final exec call to avoid `__create_fn__`, but I'm not experienced to know if that is safe.~~ (see below for open pr)\r\n\r\n@ericvsmith Let me know if this is a suitable change, and if so, which version we should open a pr based on.\r\n\r\nThank you!\r\n\r\n### Has this already been discussed elsewhere?\r\n\r\nNo response given\r\n\r\n### Links to previous discussion of this feature:\r\n\r\nhttps://discuss.python.org/t/improving-dataclasses-startup-performance/15442/18\r\n\r\n\u003c!-- gh-linked-prs --\u003e\r\n### Linked PRs\r\n* gh-110186\r\n* gh-110851\n\u003c!-- /gh-linked-prs --\u003e\r\n","author":{"url":"https://github.com/ssweber","@type":"Person","name":"ssweber"},"datePublished":"2023-09-25T21:04:40.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/109870/cpython/issues/109870"}