RFC: Adopt msgspec.Structs for 5X parse performance and unlock 25X faster query caching deserialization#249

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corydolphin wants to merge 8 commits intographql-python:mainfrom

corydolphin:msgspec-performance

Commits on Jan 5, 2026

Add serialization benchmarks for parsed documents
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Use tuples for all AST collection fields (instead of lists)
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Update minimum Python version to 3.10 and remove old python version handling
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Flatten AST node hierarchy to union types
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Make visitor immutable-friendly
corydolphin
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Fix tests to use proper AST node construction
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Major: Convert AST nodes to immutable msgspec.Struct for 5X parse performance improvement
corydolphin
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Add compact binary serialization for AST nodes (3X smaller size, 5X faster than pickle)
corydolphin
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