Struct DiffStats 

pub struct DiffStats {
    pub internal_node_skips: u64,
    pub leaf_row_skips: u64,
    pub internal_nodes_visited: u64,
    pub leaves_visited: u64,
    pub row_value_compares: u64,
    pub cursor_compares: u64,
}

Work counters for the structural diff — the performance oracle (design §2.2.2). A fork + N point-mutations diff must show O(N·height) visits and O(N) value compares; a regression (lost node sharing, or ptr_eq not firing on some target) surfaces as visits proportional to tree size instead.

Fields

internal_node_skips: u64

Whole-subtree skips via Rc::ptr_eq on a shared internal node (the O(divergence) win).

leaf_row_skips: u64

Leaf rows skipped via Arc::ptr_eq (identical stored row → no value scan).

internal_nodes_visited: u64

Internal nodes actually descended into (NOT skipped).

leaves_visited: u64

Leaves actually descended into.

row_value_compares: u64

Full-width row value comparisons (full_row_equal) — the O(columns) op.

cursor_compares: u64

Cursor comparisons (compare_cursors).

Trait Implementations

impl Clone for DiffStats

fn clone(&self) -> DiffStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DiffStats

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

Formats the value using the given formatter.

impl Default for DiffStats

fn default() -> DiffStats

Returns the “default value” for a type.

impl PartialEq for DiffStats

fn eq(&self, other: &DiffStats) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for DiffStats

impl StructuralPartialEq for DiffStats