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Running a model reported
frontend elapsed time: 0.7429769 secs
backend elapsed time: 2.985495 mins
looks ok but in fact I system.time'd the run and it reported:
> system.time(multivTwinSatFit<-mxRun(multivTwinSatModel))
Running multivTwinSat
user system elapsed
177.301 0.608 179.884
so there are some 175 seconds missing from the tally.
Also, the results from a run with @independent=T under snowfall are different and seem to be basically reporting zero seconds for backend elapsed time.