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RecallTuning

dejadb_store

Struct RecallTuning 

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pub struct RecallTuning {
    pub query_expansion: bool,
    pub rerank: bool,
    pub diversity_lambda: Option<f32>,
}
Expand description

Post-fusion recall refinements. All default off — a bare recall_hybrid behaves exactly as before. Applied inside the recall deadline; each stage degrades to plain fusion order when its backend or data is unavailable (fail-open, never an error).

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§query_expansion: bool

Tier-1: run rule-based query expansion (extra BM25 legs, RRF-fused). Uses the installed QueryExpander, or the built-in EnglishExpander.

§rerank: bool

Tier-2: cross-encoder rerank the fused candidate pool via the installed RerankBackend. Takes precedence over diversity_lambda.

§diversity_lambda: Option<f32>

Tier-1: MMR diversity reorder. lambda in [0,1] — 1.0 = pure relevance, 0.0 = maximum diversity. Requires an embedder + stored vectors; silently skipped otherwise.

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impl Clone for RecallTuning

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fn clone(&self) -> RecallTuning

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Copy for RecallTuning

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impl Debug for RecallTuning

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for RecallTuning

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fn default() -> RecallTuning

Returns the “default value” for a type. Read more

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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