Many AutoCAD Civil 3D users are aware that upgrading to a 64-bit operating system, preferably Windows 7 and Windows Vista (in that order), will give the biggest return on investment when looking at improving performance. Other opportunities to improve performance also exist.

One is multiple or multi-core processors. For the most part, AutoCAD Civil 3D runs as a single process, which means it will not utilize more than one processor, even if they are available. The exception to this is rendering, where multiple or multi-core processors can result in as much as a 250% decrease in render time. Though Civil 3D does not take advantage of multi-core processing, having multiple processors can still be beneficial since it enables you to run processes, such as anti-virus and firewall software, as well as other applications—such as Outlook—on separate processors and provide a more dedicated processor for AutoCAD Civil 3D. If you are a user who multitasks throughout the day and runs several applications at the same time, you may see added benefits in multiple or multi-core processors.

When contemplating hard drives, you should consider the data transfer rate. Faster data transfer rates will help decrease the time it takes to open Civil 3D, as well as load and save drawings that are stored locally. In addition, a faster transfer rate can increase performance when utilizing the hard drive for virtual memory, especially with 32-bit operating systems.

Beyond hardware and operating system changes, there are tactics you can implement to improve the performance of your day-to-day work in Civil 3D. These include

• Using code set styles with no fill or a solid fill. Stay away from hatch patterns.
• Avoid using the option to grid clip profile views until producing construction documents. When working with pipe networks, turn off hatching, pipe cleanup and masking until producing construction documents. Using the option ‘Display as boundary’ is also optimal.
• Use single-label components versus multiples.
• When working with surfaces use 1) external point files versus COGO points, 2) surface snapshots when possible, and 3) Level of Detail (LOD) display
• When working with corridors, turn off rebuild automatically and don’t display regions you aren’t working with. Additionally, create cross sections in a separate drawing.

This combination of operating system, hardware, and workflow adjustments can help to optimize your experience working with AutoCAD Civil 3D.

Authors: Karen Weiss, Transportation and Land Infrastructure Industry Marketing Manager, Autodesk; Jason Hickey, Senior Support Specialist, Autodesk