Struct QueryTrace 

pub struct QueryTrace {

    pub query: String,
    pub driver: String,
    pub cache: String,
    pub unchanged: bool,
    pub parse_us: u64,
    pub compile_us: u64,
    pub memo_us: u64,
    pub scan_us: u64,
    pub materialize_us: u64,
    pub merge_us: u64,
    pub total_us: u64,
    pub entries_scanned: u64,
    pub excluded_skipped: u64,
    pub hits: u64,
    pub volumes: u32,
}

Stage breakdown of one query, in microseconds.

Fields

query: String

The raw query text this trace measured.

driver: String

Which execution strategy drove candidate generation (visualized in the perf panel): e.g. “full-scan”, “pool-scan”, “suffix”, “perm-walk”.

cache: String

Per-volume query-cache outcome: “miss”, “refine” (all volumes narrowed the previous result) or “partial” (mixed).

unchanged: bool

True when this query is identical (text + options) to the previous one on every volume and produced identical id lists — the UI keeps the displayed result instead of re-publishing (no repaint churn from idle USN traffic).

parse_us: u64

Query parse time, in microseconds.

compile_us: u64

Query compile time, in microseconds.

memo_us: u64

Dir-path memo (only path queries; 0 when cached/warm).

scan_us: u64

Candidate-generation scan time, in microseconds.

materialize_us: u64

Result-row materialization time, in microseconds.

merge_us: u64

Multi-volume k-way merge.

total_us: u64

End-to-end query time, in microseconds.

entries_scanned: u64

Number of index entries examined during scanning.

excluded_skipped: u64

Number of entries skipped by exclusion rules.

hits: u64

Number of matching entries returned.

volumes: u32

Number of volumes queried.

Trait Implementations

impl Clone for QueryTrace

fn clone(&self) -> QueryTrace

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryTrace

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

Formats the value using the given formatter.

impl Default for QueryTrace

fn default() -> QueryTrace

Returns the “default value” for a type.

impl Serialize for QueryTrace

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

where __S: Serializer,

Serialize this value into the given Serde serializer.