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

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

Node JS Is single threaded asynchronous non-blocking javascript runtime, but its 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?

Node JS Is single threaded asynchronous non-blocking javascript runtime, but its 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 main Loop 0:00​ single thread, that really just loops for callbacks
  • 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

Resources

https://nodejs.org/en/docs/guides/don...

http://docs.libuv.org/en/v1.x/index.html

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