Gorilla which many of VM ideas are based on is in C++. Druid is Java and very fast but not like for like as it's an event database not a timeseries database. P

Gorilla which many of VM ideas are based on is in C++. Druid is Java and very fast but not like for like as it's an event database not a timeseries database. Pinot is in the same vein. Most of the very big and very fast databases you have used indirectly though web services like Netflix (Cassandra), etc are written in Java.