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Title: GH-135379: Specialize int operations for compact ints only by markshannon · Pull Request #135668 · python/cpython · GitHub

Open Graph Title: GH-135379: Specialize int operations for compact ints only by markshannon · Pull Request #135668 · python/cpython

X Title: GH-135379: Specialize int operations for compact ints only by markshannon · Pull Request #135668 · python/cpython

Description: This changes the way we handle ints during specialization. Instead of handling all ints we only specialize for compact ints. Since compact ints represent the large majority of ints we get a faster common path, at the cost of a few more de-optimizations. Using compact ints only, and de-optimizing in the extremely rare no-memory case, we can simplify the performance critical paths for integer operations. This is helpful for top-of-stack caching as the newer simpler instructions to not escape or need to handle errors, so avoids the need to spill to memory. This also gives us the potential to use BINARY_OP_EXTEND for multi-digit ints in the future. Issue: gh-135379

Open Graph Description: This changes the way we handle ints during specialization. Instead of handling all ints we only specialize for compact ints. Since compact ints represent the large majority of ints we get a faster ...

X Description: This changes the way we handle ints during specialization. Instead of handling all ints we only specialize for compact ints. Since compact ints represent the large majority of ints we get a faster ...

Opengraph URL: https://github.com/python/cpython/pull/135668

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a7c92fc Specialize int operations for compact ints only. Deopts before alloca… markshannon Jun 17, 2025 https://github.com/python/cpython/pull/135668/commits/a7c92fc8b9c8c4c59f943732b4be49b22b714e3e
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6a3cd5c Merge branch 'main' into specialize-for-compact-ints markshannon Jun 18, 2025 https://github.com/python/cpython/pull/135668/commits/6a3cd5c59e29801145fde798cc89bbdbc12601f0
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