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For Scala 2.13, the implementation of Future & Promise and undergone a lot of work‚ yielding some rather dramatic performance, as well as semantical, improvements. After this talk you will know what a Future and a Promise is: how they work; how they relate to ExecutionContexts & BlockContexts; and what has driven the implementation to evolve into what it is today. You will have a good grasp of the feature set, and performance, over time. You will also, most likely, have picked up some tips & tricks which will improve your use of Scala Future & Promise in the future!