All lessons
event-loop
2 free lessons tagged event-loop across Programming. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.
Programming
advancedAsync, Event Loops, and Futures
Threads are not the only model for concurrency. Learn how blocking vs non-blocking I/O works, how the event loop and reactor pattern scale to millions of connections, and how callbacks evolved into futures, promises, and async/await — plus where coroutines fit and when async loses to threads.
9 steps·~14 min
Programming
intermediateNode.js Runtime Fundamentals
How Node 22 actually runs your code: V8, the libuv event loop and its phases, microtasks vs macrotasks, blocking pitfalls, and where worker threads, npm, pnpm, and bun fit in 2026.
10 steps·~15 min