[issue44878] Clumsy dispatching on interpreter entry.

Mark Shannon added the comment: I'm somewhat surprised by that. After all, the only change in control flow was the change from a break to a goto in exception handling. I would have expected PR27726 to have made much more difference. There are a few possibilities, including: 1. It's just a

[issue44878] Clumsy dispatching on interpreter entry.

neonene added the comment: FYI, PR27727 ("Remove loop...") seems to be a bit slower than the previous commit (f08e6d1bb3c5655f184af88c6793e90908bb6338) on my Windows build (msvc14.29.16.10). pyperformance shows that Windows x64 PGO: 34 slower, 11 faster, 13 not significant, Geometric

[issue44878] Clumsy dispatching on interpreter entry.

Change by Mark Shannon : -- resolution: -> fixed stage: patch review -> resolved status: open -> closed ___ Python tracker ___ ___

[issue44878] Clumsy dispatching on interpreter entry.

Mark Shannon added the comment: New changeset a530a9538f3f444bebd2d2b71fe5f2e747e76d73 by Mark Shannon in branch 'main': bpo-44878: Remove loop from interpreter. All dispatching is done by gotos. (GH-27727) https://github.com/python/cpython/commit/a530a9538f3f444bebd2d2b71fe5f2e747e76d73

[issue44878] Clumsy dispatching on interpreter entry.

Change by Mark Shannon : -- pull_requests: +26208 pull_request: https://github.com/python/cpython/pull/27727 ___ Python tracker ___

[issue44878] Clumsy dispatching on interpreter entry.

Mark Shannon added the comment: New changeset f66d00fdd7e9a333accc6bf0e37173051aaa55d0 by Mark Shannon in branch 'main': bpo-44878: Remove the switch from the main interpreter loop when using computed gotos. (GH-27726)

[issue44878] Clumsy dispatching on interpreter entry.

Change by Mark Shannon : -- pull_requests: +26206 pull_request: https://github.com/python/cpython/pull/27726 ___ Python tracker ___

[issue44878] Clumsy dispatching on interpreter entry.

Mark Shannon added the comment: New changeset 3f3d5dcac336463bd0eed64ba0bd7666ff2da1e1 by Mark Shannon in branch 'main': bpo-44878: _PyEval_EvalFrameDefault readability improvements (GH-27725) https://github.com/python/cpython/commit/3f3d5dcac336463bd0eed64ba0bd7666ff2da1e1 --

[issue44878] Clumsy dispatching on interpreter entry.

Change by Mark Shannon : -- pull_requests: +26205 pull_request: https://github.com/python/cpython/pull/27725 ___ Python tracker ___

[issue44878] Clumsy dispatching on interpreter entry.

Change by Mark Shannon : -- keywords: +patch pull_requests: +26199 stage: -> patch review pull_request: https://github.com/python/cpython/pull/27715 ___ Python tracker ___

[issue44878] Clumsy dispatching on interpreter entry.

New submission from Mark Shannon : On entering the interpreter (_PyEval_EvalFrameDefault) we need to check for tracing in order to record the call. However, we don't do this cleanly resulting in slow dispatch to the non-quickened instruction on every call/next. -- assignee: