Performance profiling

[greglook]

Establish a way to remotely profile the wonderdome while it's running on the production hardware. So far attempts to attach jvisualvm to a remote (or ssh-tunneled) JMX port have failed. Theoretically, the following config opens the JMX port, but all connections close after sending two packets:

java \
  -Dcom.sun.management.jmxremote.ssl=false \
  -Dcom.sun.management.jmxremote.authenticate=false \
  -Dcom.sun.management.jmxremote.port=1098 \
  ...

Upgrading to the Oracle embedded JRE seems to help a lot, but some modes will definitely be hitting code that needs to be optimized further.

[greglook]

Such performance, wow: 2c488a6

Rendering process now uses all available cores!

[greglook]

Useful reference on tuning parameters for the JVM:
http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html#DebuggingOptions