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Announcement issue for plugin API changes
#6617 · msullivan opened on Apr 3, 2019
23

Labels Milestones New issue

Performance impact of --allow-redefinition-new

priority-0-high

topic-inference

#20816

· ilevkivskyi opened

on Feb 15, 2026

Integrate codspeed?

#20504

· hauntsaninja opened

on Dec 31, 2025

extremely slow type checking for constrained <code>TypeVars</code> and overloads on generic classes

topic-overloads

topic-type-variables

#20439

· quczer opened

on Dec 18, 2025

Faster parser

#19776

· JukkaL opened

on Sep 1, 2025

Remove support for JSON serialization format

#19697

· JukkaL opened

on Aug 20, 2025

Severe performance degradation with lots of constrained type variables in a generic class

topic-type-variables

#19622

· bzoracler opened

on Aug 9, 2025

<code>[mypyc]</code> indexing fixed-length tuples is extremely slow and gets slower with increse in length

#19537

· Bobronium opened

on Jul 30, 2025

Include binary wheels for ARM Windows

needs discussion

#18593

· JukkaL opened

on Feb 3, 2025

Overloads in generic classes are extremely slow when using generic self

topic-overloads

topic-self-types

topic-type-variables

#18022

· alexdrydew opened

on Oct 23, 2024

Lazily process installed packages

#17924

· JukkaL opened

on Oct 11, 2024

mypy is slow when type checking torch

#17919

· hauntsaninja opened

on Oct 11, 2024

Mypy/dmypy takes over 16GB of memory

#17105

· juandiegopalomino opened

on Apr 5, 2024