Bottleneck of operations?

[daniel.bulyovcsity]

What is bottlenecking the speed of Revit?

Let's say I'm binding a link. The project is big, for me it takes about an hour.

CPU usage is below 20%, on the most used core below 50%

No HDD action (is assume it is working from RAM)

There is plenty of free RAM

Why it is slow then? Is there some speed limit for the number of operations? What I have to do to make it faster?

[Viveka_CD]

Hi @daniel.bulyovcsity

I see that you are visiting as a new member. Welcome to the Autodesk Community! 

Depending on the size of your projects, you may still need more RAM. Since a Revit model interacts with many systems, and if any one (or more) of those systems have slow performance, the entire experience in Revit can be slowed down.

• See HERE for related information and recommendations
• Learn strategies to improve Revit performance HERE

Regarding best practices for linked files:

• Unload links of all types if not used. Temporarily unload links if not needed in the view, and reload them as required. This strategy should limit memory resources necessary to open the file. 
• If the link is located on the network, importing rather than linking may improve performance.
• Host files containing RVT file links will consume more memory on version upgrade than files lacking RVT links. Upgrade links before upgrading the host file, or if necessary, unload all RVT links before upgrading the host file
• Large projects may benefit from breaking a model into separate project files and linking them into a single central file and assigning each model to a workset (see the Worksets section). 

Some typical points to divide a single project into multiple models include the following

• Separate buildings 
• Building core
• Building shell
• Interiors
• Expansion joints
• Individual towers
• Parking structures

Please select the Accept as Solution button if my post solves your issue or answers your question.

Regards,

[Kimtaurus · Accepted solution]

One of the reasons this happens is because Revit only uses one core, so if you have a quad-core processor, only 1/4 of it's capacity is used.

[Viveka_CD]

Hi @Kimtaurus

There a number of tasks Revit will execute on multiple cores - a full list of these tasks can be found HERE

When executing these tasks, Revit uses processor speed, using other technology this speed can be accelerated.

If you find posts have solved your problem, please click on 'Accept as solution' to help others with similar questions.

Thank you.

[daniel.bulyovcsity]

Thanks for the reply but honestly it is the typical empty marketing talk. I glad you have accepted it as an answer. 

No, I have 32Gb of ram, Revit is using half of it. So it is not the RAM.

As it was mentioned it must be the single core operation but even for that is is inefficient.

How long hyper threading is out? 15 years?

Yes, I'm aware there will not be perfect answer for that since revit is... well.. we know how it is...

But this is super strange and super slow right now. Workdays are passing with no effective work for these limitations.