Struct PaneVersionRetention 

pub struct PaneVersionRetention {
    pub version_count: usize,
    pub distinct_node_count: usize,
    pub total_logical_node_count: usize,
    pub sharing_ratio: f64,
    pub distinct_struct_bytes: usize,
    pub distinct_leaf_payload_bytes: usize,
    pub distinct_extension_payload_bytes: usize,
    pub version_metadata_bytes: usize,
    pub estimated_total_retained_bytes: usize,
}

Deterministic retained-memory byte model for a PaneVersionStore.

Mirrors the canonical timeline’s PaneInteractionTimelineRetentionDiagnostics methodology (size_of struct estimates plus measured string payload bytes) so the persistent and checkpointed strategies are directly comparable. The defining economic property of structural sharing is captured here: node struct bytes scale with physically distinct (Arc-shared) nodes, not the logical node total summed over every retained version.

Fields

version_count: usize

Number of retained versions held by the store.

distinct_node_count: usize

Physically distinct Arc node allocations across all retained versions.

total_logical_node_count: usize

Sum of per-version node counts (what naive snapshot-per-version stores).

sharing_ratio: f64

(total_logical - distinct) / total_logical in [0, 1].

distinct_struct_bytes: usize

distinct_node_count × (size_of::<PersistentNode>() + ARC_HEADER_BYTES).

distinct_leaf_payload_bytes: usize

Measured leaf surface-key payload bytes over distinct nodes.

distinct_extension_payload_bytes: usize

Measured node + leaf extension-map payload bytes over distinct nodes.

version_metadata_bytes: usize

version_count × size_of::<VersionedPaneTree>() (the per-version handles).

estimated_total_retained_bytes: usize

Estimated total retained bytes (container + structs + payload + metadata).

Trait Implementations

impl Clone for PaneVersionRetention

fn clone(&self) -> PaneVersionRetention

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PaneVersionRetention

impl Debug for PaneVersionRetention

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

Formats the value using the given formatter.

impl PartialEq for PaneVersionRetention

fn eq(&self, other: &PaneVersionRetention) -> 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 Serialize for PaneVersionRetention

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for PaneVersionRetention