desgin-notes

- do not keep data in the memory
- parse eventlog every time

http://www.brendangregg.com/flamegraphs.html
https://github.com/spiermar/d3-flame-graph

related project:
  VisualVM
  https://visualvm.github.io/
  https://www.youtube.com/results?search_query=visualvm

  Java Flight Recorder (JFR) is a tool for collecting diagnostic and profiling data about a running Java application.
  https://docs.oracle.com/javacomponents/jmc-5-4/jfr-runtime-guide/about.htm#JFRUH170

  YourKit (Java Profiler) ; propriatery (better) alternative to VisualVM
  https://www.yourkit.com/java/profiler/features/

  Windows Performance Analyzer
  https://docs.microsoft.com/en-us/windows-hardware/design/device-experiences/using-windows-performance-analyzer-to-analyze-modern-standby-issues

extensible .hi files:
  https://github.com/input-output-hk/tools/pull/8