Description

markshannon

opened on Mar 9, 2026

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Merging GET_ITER and GET_YIELD_FROM_ITER will allow optimizations applied to for loops for common types like lists to also be applied to yield from loops and allow better specialization of SEND improving JIT coverage.

To merge the two instructions, SEND will have to be modified to take an extra NULL input.

This is part of #145047

Linked PRs

• GH-145667: Merge GET_ITER and GET_YIELD_FROM_ITER #146120
• gh-145667: Update dis docs for GET_ITER, FOR_ITER and SEND changes #161867

Activity

1. markshannon

   added

   performancePerformance or resource usagePerformance or resource usage

   interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

   topic-JIT

   3.15bugs and security fixesbugs and security fixes

   on Mar 9, 2026
2. markshannon

   added a commit that references this issue on Mar 21, 2026

   GH-145667: Merge `GET_ITER` and `GET_YIELD_FROM_ITER` (GH-146120)

   879c85f
3. CuriousLearner

   added a commit that references this issue on Mar 22, 2026

   Merge remote-tracking branch 'upstream/main' into fix-pythongh-138577

   2691ad9
4. markshannon

   closed this as completedon Mar 24, 2026
5. ljfp

   added a commit that references this issue on Apr 25, 2026

   pythonGH-145667: Merge `GET_ITER` and `GET_YIELD_FROM_ITER` (pythonGH…

   8e8a5b1

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