[Pyhroff]

💡 What: Consolidated full module ast.walk function traversals into a single-pass _collect_funcs helper that prunes ast.expr subtrees, memoized _names(n) sets on AST nodes, and cached _FnAnalysis metadata instances.

🎯 Why: Previously, assess_python and _Ctx executed multiple unconstrained ast.walk(tree) passes over entire module ASTs (visiting tens of thousands of expression, identifier, and constant nodes), and re-computed name sets and function metadata repeatedly.

📊 Impact: Speeds up Python reachability analysis (reach.assess) by >1.5x (over 33% reduction in overall execution time).

🔬 Measurement: Profiled with cProfile and benchmarked using time.perf_counter() over 500+ multi-function tool modules.

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PR created automatically by Jules for task 14696190999185584655 started by @Pyhroff

[google-labs-jules]

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