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I have compared simulation times of an osm-model and of the corresponding OpenStudio export idf-model: The OpenStudio version (osm) took 03:59:23 (hours::minutes:seconds) while the EnergyPlus version (idf) took 01:53:13 for simulating one full year. I expected a slight overhead by running simulations with OpenStudio but this seems excessive and probably unnecessary.

• What can developers say to explain this behavior ?
• Can this be avoided in future releases ?

I have compared simulation times of an osm-model and of the corresponding OpenStudio export idf-model: The OpenStudio version (osm) took 03:59:23 (hours::minutes:seconds) while the EnergyPlus version (idf) took 01:53:13 for simulating one full year. I expected a slight overhead by running simulations with OpenStudio but this seems excessive and probably unnecessary.

• What can developers say to explain this behavior ?
• Can this be avoided in future releases ?

I have compared simulation times of an osm-model and of the corresponding OpenStudio export idf-model: The OpenStudio version (osm) took 03:59:23 (hours::minutes:seconds) while the EnergyPlus version (idf) took 01:53:13 for simulating one full year. I expected a slight overhead by running simulations with OpenStudio but this seems excessive and probably unnecessary.

• What can developers say to explain this behavior ?
• Can this be avoided in future releases ?

UPDATE (due to questions in comments): I took an OSM and ran it through the OS App 1.14 ; then I took that same OSM, export exported to IDF, and ran the IDF with EP-launch. The run times to be compared are those given in the respective err files.

I have compared simulation times of an osm-model and of the corresponding OpenStudio export idf-model: The OpenStudio version (osm) took 03:59:23 (hours::minutes:seconds) while the EnergyPlus version (idf) took 01:53:13 for simulating one full year. I expected a slight overhead by running simulations with OpenStudio but this seems excessive and probably unnecessary.

• What can developers say to explain this behavior ?
• Can this be avoided in future releases ?

UPDATE (due to questions in comments): I took an OSM and ran it through the OS App 1.14 ; then I took that same OSM, exported to IDF, and ran the IDF with EP-launch. The run times to be compared are those given in the respective err files.