The Report of Twisted's Death

The Report of Twisted's Death

EuroPython Conference via YouTube Direct link

Intro

1 of 27

1 of 27

Intro

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The Report of Twisted's Death

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  1. 1 Intro
  2. 2 Release Manager
  3. 3 Deployed with runners that run many copies using threads or processes
  4. 4 use safely (without race conditions)
  5. 5 Thread memory overhead: 32kB to 8MB per thread
  6. 6 The approach of Twisted, Tornado, asyncio, curio
  7. 7 Identical system call at their core: Selector functions
  8. 8 Selector functions take a list of file descriptors (e.g. sockets, open files) and tell you what is ready for reading or writing
  9. 9 Selector loops can handle thousands of open sockets and events
  10. 10 Data is channeled through a transport to a protocol implementation (e.g. HTTP)
  11. 11 Sending data is queued until the network is ready
  12. 12 Higher density per core No threads required! Concurrency, not parallelism
  13. 13 You're probably waiting on the client or the database
  14. 14 coroutines are a special generator
  15. 15 Repairing library API fragmentation
  16. 16 It should be easy for (Python 3.3 ports of) frameworks like Twisted, Tornado, or even gevent to either adapt the default event loop implementation to their needs using a lightweight adapter or proxy,…
  17. 17 Reducing duplication
  18. 18 For this interoperability to be effective, the preferred direction of adaptation in third party frameworks is to keep the default event loop and adapt it to the framework's API. Ideally all third par…
  19. 19 asyncio is an apple Twisted is a fruit salad
  20. 20 Tornado is a great example of interoperation
  21. 21 Asynchronous code executed in a synchronous style
  22. 22 Why Twisted is still worth using
  23. 23 Time based releases, taken off our trunk branch
  24. 24 Super easy to make your own protocols!
  25. 25 Established library support
  26. 26 Code review Automated testing Thousands of tests
  27. 27 Python 3.4/3.5 is coming to Windows soon!

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