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pythongh-108488: Initialize JUMP_BACKWARD cache to 0, not 17 (python#…
…108591) This mis-initialization caused the executor optimization to kick in sooner than intended. It also set the lower 4 bits of the counter to `1` -- those bits are supposed to be reserved (the actual counter is in the upper 12 bits).
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Misc/NEWS.d/next/Core and Builtins/2023-08-28-22-22-15.gh-issue-108488.e8-fxg.rst
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1 @@ | ||
Change the initialization of inline cache entries so that the cache entry for ``JUMP_BACKWARD`` is initialized to zero, instead of the ``adaptive_counter_warmup()`` value used for all other instructions. This counter, unique among instructions, counts up from zero. |
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