[issue46055] Speed up binary shifting operators

Change by Mark Dickinson : -- pull_requests: +28493 pull_request: https://github.com/python/cpython/pull/30277 ___ Python tracker ___

[issue46055] Speed up binary shifting operators

Mark Dickinson added the comment: Two separate significant improvements have been pushed: thanks, Xinhang Xu! The original PR also contained a reworking of the general case for right-shifting a negative integer. The current code (in main) for that case does involve some extra allocations,

[issue46055] Speed up binary shifting operators

Mark Dickinson added the comment: New changeset 3581c7abbe15bad6ae08fc38887e5948f8f39e08 by Xinhang Xu in branch 'main': bpo-46055: Speed up binary shifting operators (GH-30044) https://github.com/python/cpython/commit/3581c7abbe15bad6ae08fc38887e5948f8f39e08 --

[issue46055] Speed up binary shifting operators

Mark Dickinson added the comment: New changeset 360fedc2d2ce6ccb0dab554ef45fe83f7aea1862 by Mark Dickinson in branch 'main': bpo-46055: Streamline inner loop for right shifts (#30243) https://github.com/python/cpython/commit/360fedc2d2ce6ccb0dab554ef45fe83f7aea1862 --

[issue46055] Speed up binary shifting operators

Change by Mark Dickinson : -- keywords: +patch pull_requests: +28464 stage: -> patch review pull_request: https://github.com/python/cpython/pull/30243 ___ Python tracker ___

[issue46055] Speed up binary shifting operators

Change by Mark Dickinson : -- nosy: +mark.dickinson ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue46055] Speed up binary shifting operators

Xinhang Xu added the comment: I post a comment to the PR showing its performance improvement. I paste it below. I think the result not bad. - I use timeit to measure time costs and any other operators or calls are excluded. For each testcase, the former is dcd2796 and the

[issue46055] Speed up binary shifting operators

Serhiy Storchaka added the comment: Could you please show any microbenchmarking results? -- nosy: +serhiy.storchaka ___ Python tracker ___

[issue46055] Speed up binary shifting operators

New submission from Xinhang Xu : See its PR. - Inspired by [bpo-44946](https://bugs.python.org/issue44946), I found there were no special shortcuts for shifting operation applied to "medium value" long object. So I modified CPython's VM to accelerate my python project where there