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adymoon Ruby 2.3 Is Only 4% Faster than 2.2

JRuby has always been promising... for the last 10 years ;)

adymoon Rails Performance – What You Need To Know

And I also like the fact that GC in 2.1 no longer takes 50-60% of execution time. Usually it's more like 30-40% now.

adymoon Rails Performance – What You Need To Know

Rails, as any tool, has its limits. When you're doing things at Twitter's scale, you need other tools.

adymoon Rails Performance – What You Need To Know

Ruby 2.1 has a very important property: GC scales linearly with the amount of memory allocated.

Before 2.1 GC performance increased polynomially. So, for example, processing 10k rows from the table could take 10 seconds, and 100k would never finish.

With 2.1 everything I do actually finishes :)