PERF: avoid NumPy fallback when casting Arrow int/string to string#63401
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…eger types When converting ArrowExtensionArray to string dtype, use PyArrow's native pc.cast() for integer and string types where the string representation matches Python's str(). This avoids unnecessary conversion through NumPy. Float and boolean types still fall back to lib.ensure_string_array because PyArrow's string representation differs from Python's str(): - Float: 1.0 -> "1" (PyArrow) vs "1.0" (Python) - Bool: True -> "true" (PyArrow) vs "True" (Python) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
fangchenli added Arrow 
When using_infer_string is False, string columns start as object dtype and get converted to Arrow, so memory is not shared. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
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mroeschke approved these changes Dec 19, 2025
mroeschke merged commit 476e987 into pandas-dev:main 42 checks passed
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mroeschke commented Dec 19, 2025
Thanks @fangchenli |
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