TimeHistoryOutput took high percentage of total simulation time for HydroFracture model

[binw1]

I have a hydraulic fracturing model which I requested TimeHistory output of some fracture related variables like pressure and aperture for every 2 (reservoir) seconds for a 400 (reservoir) seconds simulation. From Caliper it shows geos::TimeHistoryOutput::execute took about 58% of the total simulation time. The model as well as the Caliper output is attached. Is TimeHistoryOutput expected to be so expensive? @CusiniM @wrtobin

HF.zip

[wrtobin]

This may have been improved after recent hdf5 output changes / improvements