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lovubuntu/nodejs_addons.md

Created August 26, 2019 05:14
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A peek under the hood of node.js
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nodejs_addons.md

V8:

  • C++ library used by Node to provide its javascript implementation
  • It provides ways of creating objects and calling methods Libuv:
  • C library that implements Event loops, worker threads and its async behaviour
  • Brings in Cross platform capabilities for many common tasks
    • Interacting with Filesystem, Sockets, Timers, System Events
    • pthreads (POSIX thread, an execution model exists independently from a language) like implementation to handle tasks for addons that need to move beyond event loop to handle parallelisation
      • Addon authors are encouraged to avoid blocking IO operations or time intensive tasks (offloading to libuv async system operations, worker threads, or custom use of libuv threads) Internal Node.js libraries:
  • Node exports many C++ APIs which Addons can use (eg. node::ObjectWrap) Statically Linked Libraries:
  • Has many statically linked libraries like OpenSSL
  • OpenSSL, V8, libuv, zlib can be used by addons
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