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Title: bpo-42246: Remove DO_NOT_EMIT_BYTECODE macros, so that while loops and if statements conform to PEP 626. by markshannon · Pull Request #23743 · python/cpython · GitHub

Open Graph Title: bpo-42246: Remove DO_NOT_EMIT_BYTECODE macros, so that while loops and if statements conform to PEP 626. by markshannon · Pull Request #23743 · python/cpython

X Title: bpo-42246: Remove DO_NOT_EMIT_BYTECODE macros, so that while loops and if statements conform to PEP 626. by markshannon · Pull Request #23743 · python/cpython

Description: PEP 626 requires all expressions and statements to be traced, even if the code is redundant. This PR does that for while and if statements. The performance impact on while 1: loops is minimized by copying the test to the end of the loop. while test: body used to compile to: start: if not test: goto end body goto start end: It now compiles to: if not test: goto end loop: body if test goto loop end: which will be a tiny bit slower for while 1 loops and a bit faster for other while loops. I'm skipping news, as this PR is part of PEP 626 and is covered by that. https://bugs.python.org/issue42246

Open Graph Description: PEP 626 requires all expressions and statements to be traced, even if the code is redundant. This PR does that for while and if statements. The performance impact on while 1: loops is minimized by ...

X Description: PEP 626 requires all expressions and statements to be traced, even if the code is redundant. This PR does that for while and if statements. The performance impact on while 1: loops is minimized by ...

Opengraph URL: https://github.com/python/cpython/pull/23743

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