Lua Academy · Lesson

Building a Simple Event Loop

Implement a coroutine scheduler with a run queue and resume loop.

What Is an Event Loop?

An event loop runs a scheduler that resumes coroutines when their awaited events are ready. It enables multiple concurrent tasks without OS threads.

Start with a queue of ready coroutines. Each tick, process all ready coroutines one by one.

local queue = {}
local function spawn(fn)
  queue[#queue+1] = coroutine.create(fn)
end