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Title: gh-77273: Better bytecodes for f-strings by markshannon · Pull Request #6132 · python/cpython · GitHub

Open Graph Title: gh-77273: Better bytecodes for f-strings by markshannon · Pull Request #6132 · python/cpython

X Title: gh-77273: Better bytecodes for f-strings by markshannon · Pull Request #6132 · python/cpython

Description: Simplify and speed up interpreter for f-strings. tldr; Do work in the compiler instead of the interpreter. Splits the FORMAT_VALUE opcode into CONVERT_VALUE, FORMAT_SIMPLE and FORMAT_WITH_SPEC. The compiler can then emit the optimal sequence for each format expression. The three new opcodes are much simpler than the one they replace, actually removing a few lines of code from the interpreter. The CONVERT_VALUE is emitted only if a conversion is present. In the standard library only (approx) 20% of f-strings include a conversion. FORMAT_WITH_SPEC is emitted if a format specifier is present. Otherwise FORMAT_SIMPLE is emitted. In the standard library about 70% of format expressions can be formatted with just the simple (and fast) FORMAT_SIMPLE opcode. https://bugs.python.org/issue33092 Issue: gh-77273

Open Graph Description: Simplify and speed up interpreter for f-strings. tldr; Do work in the compiler instead of the interpreter. Splits the FORMAT_VALUE opcode into CONVERT_VALUE, FORMAT_SIMPLE and FORMAT_WITH_SPEC. The...

X Description: Simplify and speed up interpreter for f-strings. tldr; Do work in the compiler instead of the interpreter. Splits the FORMAT_VALUE opcode into CONVERT_VALUE, FORMAT_SIMPLE and FORMAT_WITH_SPEC. The...

Opengraph URL: https://github.com/python/cpython/pull/6132

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3af4084 Avoid conditional stack effects when compiling f-strings. markshannon Jun 5, 2023 https://github.com/python/cpython/pull/6132/commits/3af4084473987db662420ec46622f983188a1d79
a84bd65 Merge branch 'main' into better-bytecode-fstring markshannon Jun 5, 2023 https://github.com/python/cpython/pull/6132/commits/a84bd65921b717c3369e96557bd6cd099151220f
b6d7171 Fix up magic number. markshannon Jun 5, 2023 https://github.com/python/cpython/pull/6132/commits/b6d71713a37f139ff06bf44981e189c6d0593c0f
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31385d1 Merge branch 'main' into better-bytecode-fstring markshannon Jun 9, 2023 https://github.com/python/cpython/pull/6132/commits/31385d1a8ae054d10a89869400bb9ed0ce73317c
641466c Merge branch 'main' into better-bytecode-fstring markshannon Jun 9, 2023 https://github.com/python/cpython/pull/6132/commits/641466c91ed0d16d61b1283d23238172ff95ec45
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