Hi All, I know that this topic has been discussed before, but I haven’t found a solution to the problem and I think it is a really important topic. I’m experiencing the same problem described here: [image] Dynamo Makes for a Slow 2016? Revit Might have something to do with our computers, but when I use Dynamo (particularly a large, and somewhat complex definition) it brings Revit to its knees. I have to close Revit and reopen to get things back to normal. Anybody else experiencing this? What might be the cause? Finishes from Rooms.dyn (285.4 KB) Longest Line List.dyf (8.1 KB) When I run some particularly large scripts, I have to close and reopen Revit because I can’t even change a simple parameter. (For the end-user this is not a good solution) I also discard that it is a hardware issue because I tested several computers and the problem persists. Also here are some other threads about: [image] Revit slowing down after script Revit Hi All, I made a script that reads some information from an excel file and creates the border rebar for a specific wall. The script is quite big and the rebar creation is divided in 12 parts. When I run this, it takes about 10-15 seconds to run, but aftes its done, Revit works a bit slower than normal. Also, when I run it several times (correcting errors) I have to close and open Dynamo a few times, because it is slowing down progressively. In my script there are about 8-12 custom nodes that … I’m using Revit 2017.1 and Dynamo 1.3.1. Is there a way to clean the VRAM or RAM memory at the end of the script through the Revit API? Thanks for your time. Any commentary will be very appreciated. Cheers!

Not ideal @Greg_McDowell I’ll have a play around and see if I can offer some alternative solutions when I am back in the office on Monday.

I can’t give you any guarantee that it will help, but you could try the “RevitProcess.EmptyWorkingSet” from spring nodes. It will flush any non-critical memory from the active process to the swap file and hopefully spare you from a restart.

Has anyone who have experienced this issue taken a look at task manager after the slowdown begins? The only time I’ve seen such a slow down is when the graph in question has created tons of data, or has touched so many elements in the Revit model, that the ram is completely used up (and then some).

The biggest reason for slowing down is the way the graph is created. The best way to solve this is to track time taken for each session by adding time.lapse and select 1 or 2 elements. Then try other workarounds to minimize the time where you see the time.lapse is giving you more. Hope it helps!

@Kulkul if composition is the main issue, has anyone compiled anything (custom node, external script) that can perform an audit on a .dyn file? Things like: Number of nodes Number of laces Number of functions upon completion of run Run time Node package dependencies Having this kind of information available would mean you could assess where the “big script” issue starts to occur. Ultimately letting you decide how best to optimise your script (more coding, less lacing…) I’d be keen for something like that!

:+1:t2: top tip, thanks! @Kulkul

Hi All, sorry for late reply. First of all, thanks All of you for your discussion here. Very pleased to know that the issue is more often than I thought. I agree with @Greg_McDowell that closing Revit is not the best solution for a not-workshared session. @Kulkul and @Dimitar_Venkov, thanks for the suggestions. I’ll try both of your recommendations. Last but not the least, I managed to make the script using speed preference (from fastest to slowest) scripting - recommended un some past thread: Python Design Script Custom Nodes OOTB and Package Nodes For my scripts, I try to make the most of it in python. Also I’ll check the non-python parts to see if I can speed them up somehow. Again, Thanks all of you or the discussion! CHeers

Hi @Kulkul, I’m trying to replicate your recommendation for a very simple python node: [image] I have some huge measurement units which I presume they are not seconds. How do you translate it into seconds? Thanks in advance!

Revit Slows down after large Dynamo script

Developers

Kulkul November 5, 2017, 5:40am 17

@Ewan_Opie I mostly use python for my workflows i will add time inside the python so that it helps understand where is the cause

How to measure execution time for nodes?

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Revit Slows down after large Dynamo script

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