// Parallel path - lines 2406-2471
let normalized_mutual_information = if !stats_config.nmi || chunk_stats.total_pairs == 0 {
    None
} else if let Some(threshold) = cardinality_threshold {
    // ... 40+ lines of threshold checking, entropy computation, MI handling ...
} else {
    // ... 15+ lines duplicating entropy computation and MI handling ...
};

// Sequential path - lines 2790-2841
let normalized_mutual_information = if !stats_config.nmi || total_pairs == 0 {
    // ... exact same logic duplicated ...
};

// Both paths now use:
let normalized_mutual_information = compute_nmi_with_threshold(
    stats_config.nmi,
    total_pairs,
    cardinality_threshold,
    field1_info,
    field2_info,
    pair_key,
    field_names,
    &x_counts,
    &y_counts,
    &xy_counts,
    mutual_information,
);