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crates.io · #2150 most downloaded on crates.io
A lock-free token bucket ratelimiter
Last release 5 months ago
21 Apr 2026
Ships unpredictably
gaps range from 5 weeks to 4.2 years
Rarely documented
notes for 2 of 31 stable releases
Nothing withdrawn
no release was ever pulled
11 years old
31 releases · first in 2015
fix: use PR workflow for dev version bump in tag-release by @brayniac in #2
Full Changelog: v1.0.0...v2.0.0
One column per quarter.
no_std support via a new Clock trait (StdClock is the default
under the std feature).Ratelimiter::try_wait_n(n) for atomic multi-token acquisition.TryWaitError distinguishing Insufficient(Duration) from
ExceedsCapacity.Builder::period, Ratelimiter::period /
set_period / set_rate_per. Enables sub-Hz rates.impl Default for StdClock.Ratelimiter and Builder are generic over Clock; C defaults to
StdClock under std.try_wait now returns Result<(), TryWaitError>.Error and TryWaitError are #[non_exhaustive].Error::PeriodTooShort variant.try_wait no longer spins when max_tokens == 0; returns
ExceedsCapacity.release: v1.0.0 by @brayniac in #1
Full Changelog: https://github.com/iopsystems/ratelimit/commits/v1.0.0
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