With the Ruby 3.0 release, there’s been a lot of chatter about concurrency, parallelism, and async IO.

For my own reflection, I wanted to write down what that means for performance and capacity/costs of apps, and what would be the impact on the Ruby ecosystem.

I will assume that the audience already knows the difference between threads vs processes model in UNIX and the Little’s law.

https://kirshatrov.com/2021/01/06/ruby-concurrency-and-ecosystem/

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