My Mom told me that Ruby isn't thread-safe

Transcript

1. Ruby my me told mom that isn’t thread-safe
2. SHE WAS RIGHT and I was left
3. Smit Shah github.com/who828 twitter.com/who828
4. Concurrency? what is
5. 1.Concurrency is about dealing with lots of things at once
6. like dealing with this exam paper
7. 2.Concurrency is about context switching
8. like attempting another question! in case you’re stuck
9. SQL Controller Render Response Controller SQL Response Render Without concurrency in your web server Request 1 Request 2
10. SQL Controller Render Response Controller SQL Response Render With concurrency in your web server Request 1 Request 2
11. Ruby supports concurrency through threads
12. Ruby supports concurrency through threads *conditions apply
13. Parallelism? what is
14. 1.Parallelism is about doing lots of things at once
15. it’s like getting your friend to write the exam,! while you go watch a movie
16. 2.No one can guarantee that your code will run in parallel.
17. aside from Rajnikanth
18. and the kernel scheduler
19. Ruby ! doesn’t support parallelism through threads
20. use JRuby Ways to achieve parallelism
21. this JRuby disclaimer is brought to you by Flipkart
22. use JRuby Ways to achieve parallelism use :(){ :|:& };:
23. Thread-safety? what about
25. (the rainbows are just to make it hurt less)
26. “gee, I don’t really need to care about thread-safety because of the GIL”
27. “gee, I don’t really need to care about thread-safety because of the GIL”
28. About the GIL few words
29. Managing thread-safety
30. Managing thread-safety get drunk and forget about it
31. Managing thread-safety get drunk and forget about it avoid global mutations
32. Managing thread-safety get drunk and forget about it avoid global mutations prefer thread-locals
33. Managing thread-safety get drunk and forget about it avoid global mutations prefer thread-locals use the right data structures
34. Managing thread-safety get drunk and forget about it avoid global mutations prefer thread-locals use the right data structures just learn about functional programming already
35. Bundler example
36. Pepperidge Farm wants you to remember
37. “The Only Sure Thing in Computer Science, Everything is a tradeoff” – Van Roy and Haridi, Concepts, Techniques, and Models of Computer Programming
38. thanks!