Add blurb

gvanrossum · Nov 1, 2023 · ee27e73 · ee27e73
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Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/Misc/NEWS.d/next/Core and Builtins/2023-10-31-21-33-35.gh-issue-111520.vw-rxJ.rst b/Misc/NEWS.d/next/Core and Builtins/2023-10-31-21-33-35.gh-issue-111520.vw-rxJ.rst
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+Merge the Tier 1 (bytecode) and Tier 2 (micro-ops) interpreters together,
+moving the Tier 2 interpreter loop and switch into
+``_PyEval_EvalFrameDefault()`` in ``ceval.c``.
+
+**Beware!** This changes the environment variables to enable micro-ops and
+their debugging to ``PYTHON_UOPS`` and ``PYTHON_LLTRACE``.