carlduevel / clometheus Goto Github PK

This library is absolutely beautiful and a joy to use. This issue I am filing might not be a deal breaker for many, but for some cases it might be important.

When used under heavy load (tens of thousands events per second), it starts eating too much memory and is a bit heavy on CPU — due to reflection.

For example, in Histogram.observation!, I suppose that .add method gets looked up through reflection, which generates the following picture in JDK Mission Control (screenshot attached)