Hashed Wheel Timer

A simple hashed wheel timer. See http://www.cs.columbia.edu/~nahum/w6998/papers/sosp87-timing-wheels.pdf

Ported from Go version (https://github.com/BarkingMouseStudio/wheel_timer) to Rust.

Documentation

http://barkingmousestudio.com/wheel-timer-rs/wheel_timer/

Benchmarks

Rust implementation (using vec):

Pre-alpha:

test bench_wheel_timer_drain ... bench:      4644 ns/iter (+/- 628)
test bench_wheel_timer_fast  ... bench:        61 ns/iter (+/- 4)
test bench_wheel_timer_fill  ... bench:        30 ns/iter (+/- 5)

Alpha:

test bench_wheel_timer_drain ... bench:      3410 ns/iter (+/- 1198)
test bench_wheel_timer_fast  ... bench:        43 ns/iter (+/- 27)
test bench_wheel_timer_fill  ... bench:        20 ns/iter (+/- 3)

rustc 1.4.0-nightly (f05b22efb 2015-08-15):

test bench_wheel_timer_drain ... bench:       4,093 ns/iter (+/- 1,322)
test bench_wheel_timer_fast  ... bench:          50 ns/iter (+/- 25)
test bench_wheel_timer_fill  ... bench:          15 ns/iter (+/- 8)

Rust implementation (using linked list):

test bench_wheel_timer_drain ... bench:      8839 ns/iter (+/- 4160)
test bench_wheel_timer_fast  ... bench:       111 ns/iter (+/- 50)
test bench_wheel_timer_fill  ... bench:        73 ns/iter (+/- 33)

Go implementation:

BenchmarkWheelTimer_drain   200000       14081 ns/op
BenchmarkWheelTimer_fast   5000000         407 ns/op
BenchmarkWheelTimer_fill  10000000         152 ns/op