基于内存的时间轮算法、redis的zset、redis的key过期订阅事件三方式实现的延时任务调度

延迟队列任务 (时间轮)

hierarchical timing wheel

Golang timing wheel

A .NET, in-process scheduler based on Timing Wheels. Capable of handling many, short-lived, timer tasks.

a scheduler based on multi-level timing wheels. 一个基于多级时间轮的调度器。