slow Revit model

[ryley.g.h]

At our office we have 16 active projects on BIM360, but one is very slow compared to the others. It is taking 10-15 minutes to open, compared to the <5 minutes of every other model, it takes 5+ minutes  to sync, compared to the <2 minute sync time of all other models. All projects are Walmart's, so they are modeled pretty much identically. I'm currently going through the project, purging it, open/audit, downloaded/reset the central, removing all views not on sheets, removing all CAD, I found about 1,000 imported CAD line styles to remove (currently deleting these.... very time consuming). I'm using this list of things to look at: https://revitiq.com/15-revit-performance-tips/

Does anyone have any other advice of things I can look at to try and make the one project run smoother? 

[curtisridenour]

Sounds like you have a pretty good plan and are doing all the right things. The only thing i would add to the list you have is to ensure that you make sure you don't have models linked as "Room Bounding" if you don't need them to be.  I have seen that one check box cause half hour sync times because of bad geometry.

[ryley.g.h]

I didn't even know about that. It was off, but for the future now I know, thanks! 

[minjie.wang]

Thanks very much to report the issue. I am Minjie Wang, the product owner of Revit develop team. I am wondering if you could share the problematic model with my team to investigate the performance issue? It would be very challenging to make good suggestions without looking into the details of the model. The model would only be used for internal diagnosis. My email address: [email protected], thanks in advance!

[ryley.g.h]

Update: The above process worked for the most part, it fixed the syncing times but not the file open times from BIM360. By expanding the loading popup I was able to see which of the links from our consultants was taking an insane amount of time to load, and found that one link also had 2 imported CADs, and about 300 imported line styles. 

[kh_jea]

5 minute sync time sounds like a dream. 

We're at 30-40 minutes (Office tower, +30 levels) and Autodesk can't figure out why.

[ryley.g.h]

CAD imports have been the cause for us. If you use pyrevit plugin you can easily find imported (not linked) CAD files in the project. If you hit the link drop down on the far right of the Pyrevit ribbon, select drawings, and search all in model a large list will appear. If the name of a CAD file in the Pyrevit search doesn't match the name of any CAD files that appear in the Revit manage links window, that is an import and should be deleted right away. 

[kh_jea]

I just checked, there are only 2 linked dwg's, each less than half a MB. That really shouldn't cause such a problem.

Autodesk is already investigating our case, unfortunatly they/we still don't have a solution.

[ryley.g.h]

Just to be clear, imported (not linked) CAD files don't show up in the manage links window. There is a very big difference between the two options, linked are fine, imported kill your file. 

To check if you have imports without pyrevit go to the manage tab, additional setting, line patterns, and scroll down. If you see line patterns that start with the name "IMPORTED" then you got imported CAD files that need cleaned out. 

[kh_jea]

I know, i checked the imported ones as well. There are no imports.

[ryley.g.h]

The other things I can think of: 

I imagine you have multiple Revit files all linked together? If not, try that. 

I can imagine you having a lot of people working on the same file at a time, I've noticed once we get around 8 or more people on a BIM360 model it starts to slow down because people are syncing every 5 minutes. I tell our staff to go 90 minutes between syncs and that seems to help. 

Is that option that Curtis (first reply in this thread) checked off? 

Is your internet speed fast enough/is a VPN slowing down your internet speed? I've noticed that our old VPN (Forticlient) would tipple my sync times just because it would reduce my internet speed to a total crawl. 

[kh_jea]

I imagine you have multiple Revit files all linked together?

---

We do. 1 main file, with structure, MEP, facade and interior linked. Facade and structure is room bounding.

There's about 6 people working on it today.

We have very fast internet. Noone is on VPN.