pub fn generalization_efficiency(dev_delta: f64, validation_delta: f64) -> f64Expand description
Generalization efficiency (GE): how much of the development improvement between two runs transferred to validation.
GE = validation_delta / development_delta over the overall recall
means. A positive GE means validation moved the same direction as
development (semantic waves generalize); negative GE means validation
regressed while development improved (overfit). When development did not
move (dev_delta == 0) the ratio is degenerate: a validation-only
improvement counts as pure generalization (1.0), anything else as
0.0 — never NaN/inf.