Struct SessionStats 

pub struct SessionStats {
    pub ffi_calls: u64,
    pub batch_items: u64,
    pub elapsed_ns: u64,
}

Cumulative dispatch metrics for one LeanSession.

Snapshot via LeanSession::stats. Each typed query method records one FFI call; the bulk methods also record the per-item batch size. elapsed_ns accumulates the wall time spent inside the inner .call(...) dispatch (measured with Instant::now)—it excludes Rust-side argument marshaling, name lookup, and result decoding so the number is comparable across singular and bulk paths.

import is not counted: import vs. reuse is tracked at the crate::host::pool::SessionPool level. Construction of a session always pays for one import, and that cost is reported by crate::host::pool::PoolStats::imports_performed when the session flows through a pool.

Fields

ffi_calls: u64

Number of typed query FFI calls dispatched through this session, counting each singular call once and each bulk call once regardless of batch size.

batch_items: u64

Cumulative number of per-item entries processed by the bulk methods. Singular calls do not contribute. A batch of N items adds N here and 1 to Self::ffi_calls.

elapsed_ns: u64

Cumulative nanoseconds spent inside the dispatch .call(...) across every recorded FFI call.

Trait Implementations

impl Clone for SessionStats

fn clone(&self) -> SessionStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SessionStats

impl Debug for SessionStats

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

Formats the value using the given formatter.

impl Default for SessionStats

fn default() -> SessionStats

Returns the “default value” for a type.

impl Eq for SessionStats

impl PartialEq for SessionStats

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SessionStats