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Start profiling with Java FlightRecorder as well as a few custom events.

Usage[]

Profiling contains several custom events below:

  • minecraft.ServerTickTime: sampling event exposing average server tick times at one second intervals.
  • minecraft.ChunkGeneration: time taken to generate individual chunk stages.
  • minecraft.PacketRead | minecraft.PacketSent:network traffic.
  • minecraft.WorldLoadFinishedEvent: initial world loading duration.

A summary JSON report is written both to the log file and in the debug folder accompanied by a .jfr recording ready to be analyzed in i.e JMC or any other profiler tool supporting the format.

Syntax[]

jfr start
Start JFR profiling.
jfr stop
Stop JFR profiling.

Result[]

CommandTriggerJava Edition
/jfr starta jfr profiler has already been started Failed
/jfr stopthere's no jfr profiler running.
anyOn successStarts/stops the jfr profiling.

Output[]

CommandEditionSituationSuccess Count/execute store success .../execute store result ...
anyJava EditionOn failN/A00
On successN/A11

History[]

Java Edition
1.1821w37aAdded /jfr.
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