# 2 CPUs in Sketchup scene building

**URL:** <https://forums.sketchup.com/t/2-cpus-in-sketchup-scene-building/42004>\
**Category:** SketchUp\
**Created:** [March 29, 2017, 9:22pm UTC](https://forums.sketchup.com/t/2-cpus-in-sketchup-scene-building/42004 "2017-03-29T21:22:33Z")\
**Posts on this page:** 1\
**Showing post:** 32

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**Author:** ![cstrom](https://avatars.discourse-cdn.com/v4/letter/c/f19dbf/32.png) [@cstrom](https://forums.sketchup.com/u/cstrom)\
**Post date:** [April 5, 2017, 9:02am UTC](https://forums.sketchup.com/t/2-cpus-in-sketchup-scene-building/42004/32 "2017-04-05T09:02:11Z")

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Hi all,

In dec 16 I started a similar thread:

> [@Is SketchUp's engine weaker than Revit's?](https://forums.sketchup.com/t/is-sketchups-engine-weaker-than-revits/35376):
>
> Hi, In SketchUp Help center under the headline “SketchUp Hardware and Software Requirements” we can read: “Note: SketchUp will run on multiple-processor machines; however, SketchUp will only use one processor. SketchUp doesn’t support hyper-threading or multi-threading at this time” This puts a finger to the key issue of a CAD system - it’s capacity of number crunching. Today it seems as Autodesk’s Revit, Maya etc has enormous capacity of handling big heavy geometry files, while SkUp isn’t t…

I seemed like we all agreed that

1. SU cannot use multi threading because it is basically a modelling software, not a renderer.
2. “SU is a polygon modeler based on lines and faces defined by facettes whereas NURBS modelers in the CAD area as e.g. Revit/Inventor etc. are based on smooth cuves and surfaces defined by (much less) curves.” This also makes a prestanda difference.

But I still can’t help thinking “What-if” …  
So, if we focus deep into the SU system’s workflow here, isn’t it like this:  
There a only TWO basic activities: A.Changing the model (for instance moving a chair in a room) and B.Changing camera and rendersettings (position,zoom,pan,fog etc)  
In real time A and B are split up into micro-steps after which a re-RENDER is performed. So it is the render that makes a very big model lag so much after every little change, not the change itself.

This makes me think that if SU incorporated a multithreading render engine, this time critical render-step could be boosted very,very powerful. What if?

Cstrom

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