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Performance impact of --allow-redefinition-new #20816
Description
I just noticed that on self-check --allow-redefinition-new makes it ~10% slower. Probably because we infer more union types. I think we should fix (or at least investigate) this before renaming --allow-redefinition-new to --allow-redefinition.
cc @JukkaL
Activity
Do not repor trivial narrowing as a change in binder (#20862)