René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Optimize float operations by mutating uniquely-referenced operands in place (JIT only)","articleBody":"# Feature or enhancement\n\n### Proposal:\n\nWhen the tier 2 optimizer can prove that an operand to a float binary operation is uniquely referenced, we can mutate it in place instead of allocating a new `PyFloatObject`. This avoids a `PyFloat_FromDouble` allocation and the subsequent deallocation of the consumed operand on every iteration.\n\nThe unique reference tracking infrastructure added in #144300 can be used for the float operations as well. Also see #90530 where a similar optimization was proposed for tier 1 using runtime refcount checks.\n\n\n### Has this already been discussed elsewhere?\n\nNo response given\n\n### Links to previous discussion of this feature:\n\n_No response_\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-146307\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/eendebakpt","@type":"Person","name":"eendebakpt"},"datePublished":"2026-03-22T19:48:39.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/146306/cpython/issues/146306"}