topic Re: Regions cause Slow performance? in ReCap Forum

Regions cause Slow performance?

Anonymous — Wed, 30 Aug 2017 17:50:57 GMT

Man, Recap is killing me. In each scan project, I just created a few scan regions to make it easier to isolate and freeze/thaw the site fencing, electrical equipment, and everything outside of the project site. Even this simple amount of manipulation had a drastic effect on performance, making the program barely usable. The performance issue is carried through to AutoCAD as well. An exported Unified RCS file works much better in AutoCAD, but it takes hours to export from Recap and you lose the functionality of the regions. Any thoughts?

Re: Regions cause Slow performance?

anil_mistry — Wed, 30 Aug 2017 18:31:55 GMT

Hi @Anonymous,

Thank you for participating in our Community!!! Do you know what version of ReCap you are using? Current version is 4.2.1.7. Please, try following tips to improve this behavior:

Use more regions instead of putting a lot of selections into one region. The performance majorly depends on how many selections you have made instead of how many regions you have. Splitting big regions into smaller ones will help to improve the performance especially when you want to lock / hide that region, i.e. make regions to be locked / hidden contain fewer selections.
Although plane selection is very useful to select points, it scarifies some performance since plane boundary can be as big as project boundary, which spans more area compared to use rectangle selection with limited bounding box.

Keeping your selection as tight as possible to include only the points you want to select also helps to improve performance.

Please, let me know if this helps.

Thank you and have a great day!

If this post helped answer your question, please click Accept as Solution on the post so others in the community can find them easily.

Re: Regions cause Slow performance?

anil_mistry — Thu, 31 Aug 2017 13:26:50 GMT

Hi @Anonymous,

I'm just checking in again to see if you need more help with this. Did the suggestion I provided yesterday work for you?

If so, please click Accept as Solution on the posts that helped you so others in the community can find them easily.

Re: Regions cause Slow performance?

nate_bronkema — Wed, 18 Apr 2018 13:46:46 GMT

So, just to clarify, If I have a large room and I am putting wall selections into a region. It is better to put each wall in its own region, rather than putting all of the walls into one region? I completely locked up a file because I put all 4 walls (100'x100') into one region. Also, why is hiding a region hogging performance? That seems like the opposite effect of freezing a layer in AutoCAD.

Re: Regions cause Slow performance?

joshuaeYV9DB — Wed, 18 Apr 2018 16:12:56 GMT

I believe Autodesk has looked into this issue and has developed an update that helps this process. The recommended workflow would include NOT HIDING any layers. What you should do is start at the very bottom of your room/area, isolate the most bottom (I usually move my clipping/section box up about 6" at a time depending how crowded the space is), then layer your point cloud as you move up. So Create your 00-Floor layer, 01-Wall layer, 02-Columns layer, etc, and use the select tool to layer each part of your point cloud.

Once you have finished layering the point cloud in that bottom section, make your section box visible, grab the bottom of the box and drag it up, creating another increment section. This is ultimately hiding the point cloud you've already categorized, but doesnt bog down your computer/Recap.

Re: Regions cause Slow performance?

marlance — Sun, 15 Jul 2018 16:30:08 GMT

Same problem here.

I tried to put every single selection to a single region then I used unified export to rcs. It takes 3 hours for a 7.5 gb file to finish. I have 8gb ram

Re: Regions cause Slow performance?

Anonymous — Sun, 15 Jul 2018 20:02:42 GMT

What version are you using?

Re: Regions cause Slow performance?

marlance — Sun, 15 Jul 2018 20:23:38 GMT

Can't tell the version but it was installed by our IT along with c3d 2019.
At the moment, the 10 gb file is still in progress about 90% now since 5 hours ago.
Hope there is a faster and more efficient work flow. I'll let you know my recap's version when exporting is done.

Thank in advance

Re: Regions cause Slow performance?

marlance — Sun, 15 Jul 2018 20:39:17 GMT

My version is 5.0.2.41
By the way, am I using the lates version of recap?

Re: Regions cause Slow performance?

joshuaeYV9DB — Mon, 16 Jul 2018 18:38:47 GMT

This is NOT a solution response. The workflow is correct and has been confirmed to be the suggested workflow but only until all Layering/Regioning has been complete. The problem starts to take effect once all layering is complete and you try to export any Unified RCS or RCP. I have found that the PTS option has been a success but utilizing this in the model is hard as it doesn't show any features/shading differentials (aka you can't tell what that point cloud portion is). I have tried exporting/opening on two computers, both processing capacities provided below, AND the latest version on Recap Pro, still no success.

Processing PowerLayered Point Cloud (not bogging down yet)

Re: Regions cause Slow performance?

marlance — Mon, 16 Jul 2018 20:23:24 GMT

They should not have accepted as solution then. I changed my work flow. I created a new project and import the rcs file. Instead of creating region, I choose delete points and overwrite the file. There will be a prompt asking to removed points. It is faster than my previous workflow. From 5 hours now down to an hour only. BTW I just need to remove the equipment from the point cloud so I don't to classify all the points.

Re: Regions cause Slow performance?

daniel_musick — Mon, 23 Jul 2018 11:29:00 GMT

Your screenshots show that your Xeon uses only one core (6% of 16 cores) just like your laptop (26% of 4 cores).

But your laptop still packs a higher Single-Thread-Performance, although your Xeon-Tower was probably more expensive.

Opening Projects and Exporting Scan Regions are apparently not the kind of problems that can be easily parallelized.

Maybe they aren't even parallelizable, i don't know. But for now the Single-Thread prowess of your computer is key.

See this other Thread (which is also newer) "Best Computer Hardware Specs for Recap (Pointcloud)"

As @marlance mentioned, adapting your workflow to reduce computation time is possible.

Especially if you delete points. See the documentation for the ol' Shrink-N-Burn.

The more Clippings, Scan Regions and un-removed deleted points there are, the more computations have to be done, the more sluggish your ReCap behaves. Because ReCap has to compute which Points to display and which to omit.

Best of luck to both of you....

Re: Regions cause Slow performance?

Anonymous — Mon, 23 Jul 2018 22:38:07 GMT

I've been exporting a very small point cloud to PTS. I'm coming up on 2hrs. I have 32gb of ram. Fast 3.5ghz cpu. 4gb graphics.

The solution was not helpful. I would like to remove it. You are correct it should not have been accepted.

Re: Regions cause Slow performance?

jarrodbaumann7604 — Fri, 26 Oct 2018 18:48:40 GMT

Are other users satisfied that this thread is listed as the solution? Not being able to use regions or having to make many of them just to keep the application from slowing down does not seem like a solution. I have tried this on many projects and it doesn't seem to help. Once you do enough cleanup of points onto regions, Recap becomes useless.

This is a major setback. How are users supposed to cleanup scan data without this feature working? When scanning buildings, there is a lot of point data captured thru glass, and from other reflective surfaces that must be eliminated before using the scan data in an effective way. There seems to be no workable way to do this in Recap at this time. A real fix to this performance issue is needed. This needs to be top priority.

Re: Regions cause Slow performance?

nate_bronkema — Fri, 26 Oct 2018 18:51:45 GMT

Yeah, it's essentially the opposite of what we are all trained to do. Which is to divide and organize. I have since stopped using Recap and we are now working with Leica Software. Which seems much better in almost all aspects.

Re: Regions cause Slow performance?

Anonymous — Fri, 26 Oct 2018 20:30:30 GMT

What software are you using? Register360, & Cyclone?

Re: Regions cause Slow performance?

nate_bronkema — Mon, 29 Oct 2018 17:53:41 GMT

Exactly, yes.

Re: Regions cause Slow performance?

Anonymous — Fri, 18 Jan 2019 20:29:40 GMT

Jumping in a little late here, but let me see if I understand this correctly. The more regions I create, the more calculations Recap has to perform to determine what to display. And the solution is to create fewer regions, not use plane selection type, and instead use the limit box as much as possible to hide points?

That doesn't really seem like a solution. My understanding of the desired workflow is make regions in Recap, then bring the point cloud into autocad and use the regions to control visibility. Seems fundamentally based on creating a bunch of regions in Recap. Am I missing something?

Re: Regions cause Slow performance?

nate_bronkema — Wed, 23 Jan 2019 14:31:38 GMT

Yeah, that sums it up.

Re: Regions cause Slow performance?

Chad-Smith — Tue, 29 Jan 2019 03:23:54 GMT

@anil_mistry @anil.mistr wrote:
2. Although plane selection is very useful to select points, it scarifies some performance since plane boundary can be as big as project boundary, which spans more area compared to use rectangle selection with limited bounding box.

I'm having trouble understanding the implications of this. Is this suggesting that the selection process is also being saved into the RCP and adding to the slowness?

I use Plane selection a lot. I never thought the selection method would have any negative effect.