stretto 0.9.0

Stretto is a high performance thread-safe memory-bound Rust cache.
Documentation 
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/// CacheError contains the error of this crate
#[derive(thiserror::Error, Debug)]
pub enum CacheError {
  /// Count Min sketch with wrong width.
  #[error("invalid number of samples: {0}")]
  InvalidCountMinWidth(u64),

  /// Invalid Samples value for TinyLFU.
  #[error("invalid count main sketch width: {0}")]
  InvalidSamples(usize),

  /// Invalid false positive ratio for TinyLFU.
  #[error("invalid false positive ratio: {0}, which should be in range (0.0, 1.0)")]
  InvalidFalsePositiveRatio(f64),

  /// Invalid number of counters for the Cache.
  #[error("num_counters can't be zero")]
  InvalidNumCounters,

  /// Invalid max cost for the Cache.
  #[error("max_cost can't be zero")]
  InvalidMaxCost,

  /// Invalid insert buffer size for the Cache.
  #[error("buffer_size can't be zero")]
  InvalidBufferSize,

  /// Error when send msg between threads.
  #[error("fail to send msg to channel: {0}")]
  SendError(String),

  /// Error when receive msg between threads.
  #[error("fail to receive msg from channel: {0}")]
  RecvError(String),

  /// Error when updating entries
  #[error("update error: {0}")]
  UpdateError(String),

  /// Error when inserting entries
  #[error("insert error: {0}")]
  InsertError(String),

  /// Error when removing entries
  #[error("remove error: {0}")]
  RemoveError(String),

  /// Error when cleaning up
  #[error("cleanup error: {0}")]
  CleanupError(String),

  /// Channel send error
  #[error("channel error: {0}")]
  ChannelError(String),
}