Struct ThroughputCache 

pub struct ThroughputCache { /* private fields */ }

Caches the ThroughputValue for a given ThroughputKey.

This cache is used to avoid recomputing throughput values for the same key. Stores on disk when std is available, otherwise stores in memory.

Implementations

impl ThroughputCache

pub fn get_for_device(name: &str) -> Arc<Mutex<ThroughputCache>>

Gets or creates a global ThroughputCache for the given device name.

pub fn new(name: &str) -> ThroughputCache

Creates a new ThroughputCache with the given name.

pub fn insert(&mut self, key: ThroughputKey, value: ThroughputValue)

Inserts a new ThroughputValue into the cache for the given ThroughputKey.

Throughput measurements are nondeterministic, so a concurrent process (or an earlier run) may have recorded a different value for the same key; the cache keeps the existing value in that case rather than failing.

pub fn get(&self, key: &ThroughputKey) -> Option<&ThroughputValue>

Returns the ThroughputValue for the given ThroughputKey, if it exists in the cache.