perf(tools): cache extracted string values in ToolCallDag to avoid double scan#1766
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perf(tools): cache extracted string values in ToolCallDag to avoid double scan#1766
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Add `string_values: Vec<Vec<String>>` field to `ToolCallDag` populated during `build()`. Expose cached values via `string_values_for(idx)` and use them in the tier dispatch loop in `native.rs` instead of calling `extract_string_values` again per-tool — removes the redundant JSON traversal (closes #1714).
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Summary
string_values: Vec<Vec<String>>field toToolCallDag, populated once inbuild()by reusing theextract_string_valuestraversal that already runs there.pub(super) fn string_values_for(&self, idx: usize) -> &[String].native.rsto calldag.string_values_for(idx)instead of re-invokingextract_string_values(&tc.input)— eliminates the redundant per-tool JSON traversal (PERF-02).Closes #1714.
Test plan
dag_*filter: 11 tests)cargo +nightly fmt --checkcleancargo clippy --workspace --features full -- -D warningsclean