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The cover
  1. B1Runtime & tooling
  2. B2Modules & npm
  3. B3File system & paths
  4. B4Core HTTP
  5. B5Express basics
  6. B6Environment & config
  7. B7Async in Node
  8. B8Error handling
  9. B9First API
  1. I1Event loop
  2. I2EventEmitter
  3. I3Streams & buffers
  4. I4REST APIs at scale
  5. I5API design principles
  6. I6Databases
  7. I7Caching
  8. I8Auth & sessions
  9. I9Testing
  10. I10Child processes & OS
  11. I11Logging & monitoring
  12. I12Security fundamentals
  13. I13WebSockets
  14. I14Background jobs & queues
  15. I15Deployment basics
  1. A1Node internals
  2. A2Worker threads & clustering
  3. A3Streams at scale
  4. A4Performance & profiling
  5. A5AsyncLocalStorage
  6. A6Scalable architectures
  7. A7Message queues
  8. A8Serverless
  9. A9GraphQL & APIs
  10. A10Security in depth
  11. A11Native addons
  12. A12Observability
  13. A13TypeScript at scale
  14. A14Build tooling & monorepos
  15. A15CI/CD pipelines
  16. A16Production readiness
  17. A17Advanced HTTP

NoI1 · Part 2 · Intermediate

The event loop in Node

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Sketch only

01This chapter will cover

The event loop in Node

  • libuv phases: timers, poll, check, close callbacks
  • Timers vs setImmediate vs microtasks in Node

→Next stop

  1. B9Previous · B9Building your first API
  3. I1you are here
  5. Next · I2EventEmitter & the observer patternNext chapter

01Meanwhile

  • JavaScript is written, start there
  • R3 · JavaScript & TS covers this in the interview book