This talk was recorded at BeeScala 2017 in Ljubljana, Slovenia. Follow along on Twitter @BeeScalaConf and on the website for more information [ Ссылка ].

Abstract:

Case class is a most widely used way to model your data. But when the data is huge, you can amazingly discover that only a tiny 10% of your precious RAM used for the data itself. But where is other 90%?

During this talk, you will have a deep dive to the JVM internals learning about case class layout, Scala collections true memory overhead and ways to decrease it. We’ll introduce a scala-packed, the project helped Findify to solve a real-life case of reducing memory usage by an order of magnitude by extending Scala collections with transparent Shapeless-based case class packing.

свернуть