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RailsConf 2019 - Performance Improvement of Ruby 2.7 JIT in Real World by Takashi Kokubun

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Have you ever tried MRI's JIT compiler in Ruby 2.6? Unfortunately it had not improved Rails application performance while it achieved a good progress on some other benchmarks.

Beyond the progress at Ruby 2.6, JIT development on Ruby 2.7 will be dedicated to improve performance of real-world applications, especially Ruby on Rails. Come and join this talk to figure out how it's going well and what you should care about when you use it on production.