Module tor_circmgr::timeouts

Code for estimating good values for circuit timeouts.

We need good circuit timeouts for two reasons: first, they help user experience. If user wait too long for their circuits, or if they use exceptionally slow circuits, then Tor will feel really slow. Second, these timeouts are actually a security property.

Modules

• estimator 🔒
  Declarations for a TimeoutEstimator type that can change implementation.
• pareto 🔒
  Implement Tor’s sort-of-Pareto estimator for circuit build timeouts.
• readonly 🔒
  Implement a timeout estimator that just uses another process’s estimates.

Enums

• Action
  A possible action for which we can try to estimate a timeout.

Traits

• TimeoutEstimator 🔒
  An object that calculates circuit timeout thresholds from the history of circuit build times.

Functions

• mul_duration_f64_saturating 🔒
  A safe variant of Duration::mul_f64 that never panics.