Struct SearchMetrics 

pub struct SearchMetrics { /* private fields */ }

Lightweight, lock-free performance metrics for vector search operations.

Tracks:

• total number of queries executed
• cumulative latency in microseconds (for mean computation)
• minimum and maximum observed latency
• approximate p50, p90, p99 percentiles (computed from a sorted snapshot)

Implementations

impl SearchMetrics

pub fn new() -> Self

Create a new metrics collector.

pub fn record_query(&self, latency_us: u64)

Record a single query with its observed latency in microseconds.

pub fn total_queries(&self) -> u64

Total number of queries recorded.

pub fn mean_latency_us(&self) -> Option<f64>

Mean latency in microseconds, or None if no queries have been recorded yet.

pub fn min_latency_us(&self) -> Option<u64>

Minimum observed latency in microseconds.

pub fn max_latency_us(&self) -> Option<u64>

Maximum observed latency in microseconds.

pub fn throughput_qps(&self) -> Option<f64>

Approximate throughput in queries per second, computed from the mean latency. Returns None if no queries recorded or mean is zero.

pub fn percentile_us(&self, p: f64) -> Option<u64>

Compute the p-th percentile (0–100) latency from the current reservoir sample. Returns None if no samples are available.

pub fn reset(&self)

Reset all counters.

Trait Implementations

impl Debug for SearchMetrics

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

Formats the value using the given formatter.

impl Default for SearchMetrics

fn default() -> Self

Returns the “default value” for a type.