pub struct RecentRegionLatency;Expand description
The lowest latency seen for each DERP region across the retained measurement history —
the Rust analog of Go netcheck.Client.RecentRegionLatency(), and what
Runtime::suggest_exit_node ranks exit-node
candidates on.
Ranking on this rather than on the newest report is the whole point: every measurement
this fork makes is partial (ts_netcheck::Config::complete_threshold ends it once
three regions have answered), so the newest report names a handful of regions and a
candidate homed anywhere else would be ranked against nothing — collapsing the
suggestion to a uniform random pick. The union over the retained window gives every
region a recent latency to be ranked on.
The window (DERP_HISTORY_MAX_AGE) is re-applied here, at read time, not just when
a measurement lands: the history is only pruned on arrival, so a node that has gone
quiet must not serve latencies that have since aged out. An immediate answer (does not
block); empty before the first DERP-latency measurement.
Trait Implementations§
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impl Freeze for RecentRegionLatency
impl RefUnwindSafe for RecentRegionLatency
impl Send for RecentRegionLatency
impl Sync for RecentRegionLatency
impl Unpin for RecentRegionLatency
impl UnsafeUnpin for RecentRegionLatency
impl UnwindSafe for RecentRegionLatency
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