Struct StatsCollector 

pub struct StatsCollector {
    pub key_events_processed: u64,
    pub key_events_passed: u64,
    pub key_events_dropped: u64,
    pub per_key_stats: Vec<KeyStats>,
    pub per_key_near_miss_stats: Vec<NearMissStats>,
    pub overall_bounce_histogram: TimingHistogram,
    pub overall_near_miss_histogram: TimingHistogram,
}

Top-level statistics collector. Owned and managed by the logger thread. Accumulates counts, drop timings, and near-miss timings for all processed events.

Fields

key_events_processed: u64

Total count of key events processed (passed or dropped).

key_events_passed: u64

Total count of key events that passed the filter.

key_events_dropped: u64

Total count of key events dropped by the filter.

per_key_stats: Vec<KeyStats>

Holds aggregated drop stats per key code. Uses a fixed-size array for O(1) lookup.

per_key_near_miss_stats: Vec<NearMissStats>

Holds near-miss stats per key code and value. Indexed by keycode * 3 + value.

overall_bounce_histogram: TimingHistogram

Overall histogram for all bounce timings. Aggregated before reporting.

overall_near_miss_histogram: TimingHistogram

Overall histogram for all near_miss timings. Aggregated before reporting.

Implementations

impl StatsCollector

pub fn with_capacity() -> Self

Creates a new StatsCollector with pre-allocated storage.

pub fn record_event_info_with_config( &mut self, info: &EventInfo, config: &Config, )

Updates statistics based on information about a processed event, using the provided configuration. This is the central method for stats accumulation, called by the logger thread.

pub fn aggregate_histograms(&mut self)

Aggregates per-key histograms into the overall histograms. Should be called before generating reports.

pub fn format_stats_human_readable( &mut self, config: &Config, report_type: &str, writer: impl Write, ) -> Result<()>

Formats human-readable statistics summary and writes it to the provided writer. Returns an io::Result to handle potential write errors.

pub fn print_stats_to_stderr(&mut self, config: &Config, report_type: &str)

Prints human-readable statistics summary to stderr by calling format_stats_human_readable.

pub fn print_stats_json( &mut self, config: &Config, runtime_us: Option<u64>, report_type: &str, writer: impl Write, )

Prints statistics in JSON format to the given writer. Includes runtime provided externally (calculated in main thread).

Trait Implementations

impl Clone for StatsCollector

fn clone(&self) -> StatsCollector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StatsCollector

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

Formats the value using the given formatter.

impl Default for StatsCollector

fn default() -> Self

Returns the “default value” for a type.