Issue:

Slow performance when working in Revit.

Causes:

Working in a Revit model involves interacting with many systems, and if any one (or more) of those systems has slow performance, the entire experience in Revit can be slowed down.

At a high level, there are the following systems:
  • The Revit software.
  • Revit Add-ins: How to Disable Add-Ins for Revit Products.
  • Supporting applications (e.g. Microsoft .NET FrameworkVisual C++ Redistributable).
  • The Windows user account (there can be issues with the level of permissions allowed to the user, or with corruption at the account level).
  • Third party applications and services (that are running at the same time as Revit taking resources away from the system and potentially directly interfering with the program).
  • The storage media (slow performance reading or writing to the storage media will slow down operations that do this).
  • The operating system (OS updates can influence Revit performance).
  • The system hardware (including CPU, Graphics Card, RAM etc.).
Important points to keep in mind when looking at performance issues:
  • If the performance recently changed, what (if any) of the items above were changed?
  • What are you comparing the performance against? (e.g. If a new system appears to be slower than an older system, review the journals of both systems when going through similar steps to look for differences as well as comparing the specifications between the systems).

Solution:

To resolve this issue, first check the Revit Model Performance Technical Note for areas of improvement.

If Revit performance is not improved after using the information from the model performance technical note, check if any of the following articles apply to your situation:

Notes:
  • If the slowness appeared recently, check the "Programs and Features List" for recently installed Windows updates and perform rollbacks if needed.
  • Alternatively, if Windows has not been updated recently, verify that the machine is running the most up-to-date build of Windows.