Performance Page

Use the options on this page to optimize Autodesk Navisworks performance.

Memory Limit

Auto: Indicates whether Autodesk Navisworks automatically determines the maximum memory that can be used. Selecting this check box sets the memory limit to the lowest of your available physical memory or address space, less that required for your operating system.
Limit (MB): Specifies the maximum memory that Autodesk Navisworks can use.

Merge Duplicates

These options improve performance by multiply instancing matching items. Rather than storing every item in memory, if any items are the same, Autodesk Navisworks can store one instance of them and 'copy' that instance into other positions. This is of particular benefit on larger models, where there are significant numbers of these duplicate geometries.

On Convert: Select this checkbox to merge duplicates when a CAD file is converted into the Autodesk Navisworks format.
On Append: Select this checkbox to merge duplicates when a new file is appended to the currently opened Autodesk Navisworks file.
On Load: Select this checkbox to merge duplicates when a file is loaded into Autodesk Navisworks.
On Save NWF: Select this checkbox to merge duplicates when the current scene is saved in the NWF file format.

On Load

Collapse on Convert

Collapses the tree structure on the Selection Tree to the specified level when native CAD files are converted into Autodesk Navisworks. Select from the following options:

None - the tree is fully expanded. Use this option to enable splitting polylines into individual segments when importing DWGs and DGNs to support multiple clash intersections. The Clash Detective feature is available for Autodesk Navisworks Manage users only. For DGN files, you also need to select File ReadersDGNSplit Lines check box, and deselect File ReadersDGNMerge Lines and Arcs checkbox. For DWG files, you also need to set File ReadersDWG/DXFLine Processing drop-down to Separate All Lines.
Composite Objects - the tree is collapsed up to the level of composite objects.
All Objects - the tree is collapsed up to the level of objects.
Layers - the tree is collapsed up to the level of layers.
Files - the tree is collapsed up to the level of files.

This enables performance to be prioritized over structure/properties and has the added benefit of improving streaming by cutting down the logical structure.

Note: Although Autodesk Navisworks tries to collapse items to the fewest number possible, it may be necessary to prevent collapsing in some cases to preserve model fidelity. For example, if an item has properties or materials unique to itself, then collapsing would endanger this information, and therefore it will not be collapsed.

Close NWC/NWD files on Load

Indicates whether NWC and NWD files are closed once they’ve been loaded into memory.

When you open NWC/NWD files, Autodesk Navisworks locks them for editing. By selecting this checkbox, you instruct Autodesk Navisworks to close NWC or NWD files as soon as they’ve been loaded into memory. This means that the files can be opened and edited by other users while you are viewing them.

Create Parametric Primitives

Select this checkbox to enable creation of parametric models (models described by formulae not vertices).

Using this option allows you to get better looking visuals, faster rendering, smaller memory footprint (especially, when loading DGN and RVM files with significant amounts of parametric data that no longer need to be converted into vertices in Autodesk Navisworks).

Note: Modifying this option takes effect when you next load or refresh file.

Optimise On Load

Select this checkbox to remove duplicate materials when loading NWD and NWC files. This reduces memory usage and can help to prevent software crashes.

Temporary File Location

Auto: Indicates whether Autodesk Navisworks automatically selects your user Temp folder.
Location: Click to open the Browse for Folder dialog box, and select the desired Temp folder.