3 billion items in Java Map with 16 GB RAM3 billion items in Java Map with 16 GB RAM One rainy evening I meditated about memory managment in Java and how effectively Java collections utilise memory. I made simple experiment, how much entries can I insert into Java Map with 16 GB of RAM? Goal of this experiment is to investigate internal overhead of collections. So I decided to use small keys and small values. All tests were made on Linux
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