When is NodeJS Single Threaded and when is it multi-Threaded?

Node JS Is single-threaded asynchronous non-blocking javascript runtime, but it's not always single-threaded there are occasions where nodejs uses multi-threading, so the questions we will try to answer in this video, when is nodejs single-threaded and when does it use multi-threading and how will that affect my app? Event Loop single thread, that really just loops for callbacks 0:00 Threading in Node jS (libuv) 4:00 used for IO/intensive DNS queries file system reads CPU intensive crypto compression process.env.UV_THREADPOOL_SIZE=1 Examples 8:00 Cluster Nodejs 16:00 Example 1 HTTP server return 1 HTTP server while 1 HTTP server with file system read async HTTP server with file system read sync HTTP server with fetch call to server (dns) Support my work on PayPal https://bit.ly/33ENps4 Become a Member on YouTube https://www.youtube.com/channel/UC_ML5xP23TOWKUcc-oAE_Eg/join 🧑‍🏫 Courses I Teach https://husseinnasser.com/courses