[ty] Stream indexed AST construction#26184
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charliermarsh
approved these changes
Jun 21, 2026
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Summary
Stream the AST index into 64-node packed chunks instead of retaining a whole-AST pointer vector. This reduces transient allocation by 8.8 MB on Flake8 and 20.8 MB on Trio without changing the retained index layout.
Performance
2-3% across all projects
Test Plan
Testing: Passed ruff_db tests, Clippy, and repository hooks.