Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

DView Loading Data Extremely Slowly

asked 2018-03-09 09:38:03 -0600

OpenStudio now uses DView directly for data visualization instead of ResultsViewer. However, while trying to open data dview takes several minutes (sometimes 15 or more) just to open a small output file. Are there any fixes I can do to that will make this process faster?

In the meantime, I will likely need to use another results viewer because this is too slow.

edit retag flag offensive close merge delete

5 Answers

Sort by ยป oldest newest most voted

answered 2018-03-09 10:06:05 -0600

updated 2018-03-09 10:11:48 -0600

I see slowdowns when I have lots of output variables, and ask DView to convert them to IP (presumably because of all the converting being done), but never up to 15+ minutes.

What operating system are you using? Does the time to open depend on which output variables you report?

You might want to log an issue here, including operating system used, OpenStudio version, etc.

Otherwise, you can get ResultsViewer from previous OS installations (described here).

edit flag offensive delete link more



Hi Eric, I am on Windows 10. I am trying to open the sql file that is about 45mb and not converted to IP. Thank you for those links. I have installed a legacy version of Results Viewer with much better success. I will consider logging an issue on GitHub if I can isolate the problem. Right now it seems like an SQL file opening is very slow.

JustinShultz's avatar JustinShultz  ( 2018-03-09 10:30:15 -0600 )edit

I'm also on Windows 10 and am having this issue. My sql file is about 46MB and not converted to IP. But even if I don't tell it to convert to IP when launching DView, it still takes a long time to open. I'm going to log an issue on GitHub.

anchapin's avatar anchapin  ( 2018-07-31 10:03:01 -0600 )edit

@anchapin please post the GitHub issue link when you do so that I can post my experience and keep track of the solution.

JustinShultz's avatar JustinShultz  ( 2018-08-07 10:16:01 -0600 )edit

@JustinShultz the GitHub issue link is here.

anchapin's avatar anchapin  ( 2018-08-07 10:36:51 -0600 )edit

answered 2020-07-13 20:28:01 -0600

mikesweeney's avatar

updated 2020-07-21 09:24:47 -0600

i'm working on an open-source tool that is installable for mac and PC, which aims to solve exactly this issue. It currently only supports SQLite outputs, but it loads available hourly and sub-hourly reports nearly instantaneously--even for very large simulations--and only pulls queried reports into system memory as required. it features unit conversion, multiple simulations at once, heatmaps, line charts, histograms, scatter plots, statistical summaries, and CSV / clipboard export.

Hope this helps. It's currently in beta testing so if you use it, please let me know your thoughts!

source code and link to installable files:

edit flag offensive delete link more

answered 2019-05-27 15:06:42 -0600

RicardoGallegos's avatar

I use Dview to import CSV output files generated by e+, not open studio , and it works fine.

edit flag offensive delete link more

answered 2019-05-21 12:26:59 -0600

I've also found Dview to be painfully slow when loading files, sometimes I can barely even get it to open on its own.

I've found that if I close most programs that I'm running that helps quite a bit. Also rebooting my computer seems to help (maybe just by ensuring not a lot of junk is running in the background).

edit flag offensive delete link more

answered 2020-07-21 15:23:59 -0600

TheEnergyTutor's avatar

I just uploaded a video of one way to get to the DVIEW data by running the application directly from windows. Mine does not open within openStudio.

This may help you.

edit flag offensive delete link more


Hello, your video is private, we can't watch it :'(

lamachat's avatar lamachat  ( 2020-09-09 11:12:35 -0600 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools



Asked: 2018-03-09 09:38:03 -0600

Seen: 837 times

Last updated: Jul 21 '20