Latency debug data for API and assembly actions

The API probe data includes latency metrics for API and assembly action processing.

The latency log data uses the following format.

"latencyLog":
  {
    "ExtLatency": "TS=0,HR=0,BR=0,PS=0,RT=2,COR=2,CI=3,RL=59,SE=59,XS=60,
                   SV=62,SV=63,JTG=68,JTV=75,GS=77,IV=80,PAR=82,XSL=85,
                   X2J=86,SW=86,XC=86,RES=87,rPC=87,TC=87,"
  },

The representation of each action is by a keyword with its duration in milliseconds, which indicates the elapsed processing time. Durations are recorded for only completed events and are listed in the processing order.

The following table lists the keywords for API and assembly actions. As processing can include processing action, see Keywords for processing actions for enhanced latency messages.