Module 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.