AS has been mentioned in the past, E+ makes a lot of hard disk read / writes, so a fast hard drive also makes a difference. I use a solid state hard drive, but have not measured the impact.
James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Yi Zhang
Sent: Thursday, April 11, 2013 12:30 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: [EnergyPlus_Support] Energy Plus simulation run
Yes, I second that!
You can see in the benchmark results that 64bit Linux version of E+ is faster than the 64bit Windows version, which is in turn faster than the 32bit Windows version. The overall difference can be as much as 25%.
Hardware makes a big difference, too. On average, the benchmark models take only 17 seconds to run on my £500 desktop, compared to 30 seconds on the 3 year old laptop (£1,500 when new!) Upgrade your computer may be well worth it, if you are going to use it often.
Cheers,
Yi
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Ivan Korolija
Sent: 10 April 2013 18:36
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Energy Plus simulation run
Harshul,
In addition to Jean's and Jim's suggestions you might think about hardware upgrade :).
We've tested quite a few processors (http://www.iesd.dmu.ac.uk/~jeplus/wiki/doku.php?id=examples:tests:processor_speed_benchmarks) and the conclusion is clear:
more powerful processor = faster simulations.
We also found that the Linux version is up to 10% faster than the Windows version tested on the same hardware.
Cheers,
Ivan
Dr Ivan Korolija
IESD, De Montfort University, Leicester, UK
From: harshul <harshul263@xxxxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Wednesday, April 10, 2013 2:21 AM
Subject: [EnergyPlus_Support] Energy Plus simulation run
Hi
My IDF file is 1.5 mb and it takes half an hour to run the simulation? Is there any technique to make it fast?
Thanks
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