Struct QueryStats 

pub struct QueryStats {
    pub pages_accessed: usize,
    pub index_entries_scanned: usize,
    pub results_found: usize,
    pub execution_time_us: u64,
    pub index_used: Option<IndexType>,
    pub bloom_filter_used: bool,
    pub bloom_false_positives: usize,
    pub cached: bool,
}

Query execution statistics

Fields

pages_accessed: usize

Number of pages accessed

index_entries_scanned: usize

Number of index entries scanned

results_found: usize

Number of results found

execution_time_us: u64

Query execution time in microseconds

index_used: Option<IndexType>

Index used for the query

bloom_filter_used: bool

Whether bloom filter was used

bloom_false_positives: usize

Number of bloom filter false positives

cached: bool

Whether results were cached

Implementations

impl QueryStats

pub fn new() -> Self

Create new query statistics

pub fn with_index(self, index: IndexType) -> Self

Record the index used

pub fn with_bloom_filter(self, used: bool, false_positives: usize) -> Self

Record bloom filter usage

pub fn with_execution_time(self, time_us: u64) -> Self

Record execution time

pub fn avg_time_per_result(&self) -> f64

Calculate average time per result (in microseconds)

pub fn bloom_filter_effectiveness(&self) -> f64

Calculate bloom filter effectiveness (percentage of false positives)

Trait Implementations

impl Clone for QueryStats

fn clone(&self) -> Self

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.

impl Default for QueryStats

fn default() -> Self

Returns the “default value” for a type.