Struct QueryStats 

pub struct QueryStats {
    pub query_id: String,
    pub total_duration: Duration,
    pub phase_durations: HashMap<QueryPhase, Duration>,
    pub triples_matched: usize,
    pub results_count: usize,
    pub peak_memory: usize,
    pub joins_performed: usize,
    pub cache_hit_rate: f64,
    pub start_time: Option<Instant>,
    pub end_time: Option<Instant>,
}

Statistics for a single query execution

Fields

query_id: String

Query text or ID

total_duration: Duration

Total execution time

phase_durations: HashMap<QueryPhase, Duration>

Time spent in each phase

triples_matched: usize

Number of triples matched

results_count: usize

Number of results returned

peak_memory: usize

Peak memory usage (bytes)

joins_performed: usize

Number of joins performed

cache_hit_rate: f64

Cache hit rate (0.0 - 1.0)

start_time: Option<Instant>

Start timestamp

end_time: Option<Instant>

End timestamp

Implementations

impl QueryStats

pub fn new(query_id: String) -> Self

Create new query statistics

pub fn phase_duration(&self, phase: QueryPhase) -> Duration

Get duration for a specific phase

pub fn throughput(&self) -> f64

Get throughput (results per second)

pub fn mb_per_second(&self) -> f64

Get MB processed per second

pub fn report(&self) -> String

Generate human-readable report

Trait Implementations

impl Clone for QueryStats

fn clone(&self) -> QueryStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryStats

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

Formats the value using the given formatter.