Timer wheel - Rust

Single-level hashed timer wheel. O(1) schedule and cancel; tick fires every timer with rounds=0 in the current bucket.

Part of the submillisecond.com cookbook. Zero external dependencies; std only.

Install

[dependencies]
subms-timer-wheel = "0.4"

Quickstart

cargo test --release
cargo run --example demo

Public API

• pub struct TimerWheel<V>
• pub fn new(num_slots: usize) -> Self
• pub fn num_slots(&self) -> usize
• pub fn schedule(&mut self, delay_ticks: usize, value: V) -> u64
• pub fn cancel(&mut self, id: u64) -> bool
• pub fn tick(&mut self) -> Vec<V>

Files

• src/lib.rs - implementation.
• tests/ - integration tests; correctness, edge cases, property/stress.
• examples/demo.rs - stdout walkthrough.
• examples/perf_main.rs - bench entry (behind the harness feature).

License

Dual-licensed under MIT OR Apache-2.0.