SketchUp Runs Slow After CAD Import


#1

My Sketchup 2015 runs incredibly slow. I have robust Nvidia card set to automatic and this setup has always been fine.
I imported a couple of pretty complicated DXF files and it takes forever to open groups, select, erase and explode. Program flikcers in and out of not working or working. I have purged all I can and no chage.
These are just lines and no faces. Should that be so heavy?
I have the option to use the cleanup plugin, but I am hesitant to do that because it could get rid of more then I want.
Anyone familiar to this problem?


#2

SketchUp development is focused on performance.
Updating to 2018 won’t solve all your modeling problems, but it will provide best performance.
SketchUp Release Notes
https://help.sketchup.com/en/article/141303


The term “pretty complicated” doesn’t carry much meaning.
• How many Edges, Groups and Components does Model Info > Statistics indicate?


Key to efficient modeling is to bring into the model only what you need.
• How much of the DXF import is truly relevant to what you want to accomplish in SU?


Preparing a CAD file for import into SU can ease the pain.
• Make a copy of the DXF and prepare it for import into SU.
• Delete and purge all, except what you absolutely must have to work with in SU.

Starting with a CAD File in SketchUp — SketchUp Help
https://help.sketchup.com/de/article/3000166


Consider whether importing CAD geometry is really necessary.

• If the reason behind a 2D CAD import is merely to a provide a reference, then, consider importing a PNG image of the CAD drawing.
• Imported CAD geometry can (and often does) contain gaps, overruns, may be off-axis or non-coplanar.
• Tracing imported geometry or incorporating that geometry into a model tends to propagate the errors.
• Building an accurate model on top of an imported raster image of the CAD drawing eliminates them.


How the model is rendered onscreen (the active Style) has a tremendous impact upon performance.
• A model is made of Edges and Faces and performs best when nothing more is rendered onscreen.
• Turn off shadows
• Render in Monochrome
• Turn off Back Edges, Profiles, Depth Cue, Extension, Endpoints, Jitter

How do I make SketchUp run faster? — SketchUp Sage Site


#3

run it on a copy, and you’ll soon find out…

john


#4

Thanks Geo. I ended up importing tiff images af the drawings into sketchup and allowed for full resolution. I traces it there and finished the work in about the third of the haf the time I spent pulling out my hair in frustration trying to make the cad method work.
I have used DXF files before without much problem, but these were a tad bigger. Before I cleaned up, made faces and connected broken lines with very useful extensions.
I do not plan to upgrade to 2018 for the moment. Migrating extensions and setting up everything is much too time consuming and frustrating. I wish that SU worked out a painless upgrade. Maybe a cloudbased one, where my setup is saved and can resume working with the old setup as it was.
A new version every year is strange when often those upgrades are marginal bug fixing. Why not do like Adobe. Update when neccessary and launch new version when a big makeover has been done.
Just thinking outloud. :wink:


#5

I actually thought about that, but every action, werther copying, cleaning, erasing and exploding etc, took an hour and a half with fans singing in the wind. I later opened one file and put it throug cleanup and the plan practicly disappeared. :smiley:

I finally fell on the old and sturdy method of tracing an image and everything went well. Did it in half the time I so stubbornly spent trying to make this work.
By allowing for full image size in preferances I had a crisp and clear base to work on.


#6

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