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SharmaKona-Adro10-Marble
10-Marble
July 1, 2025
Solved

Creo Large Assy Loading Speed

  • July 1, 2025
  • 3 replies
  • 1928 views

Hey folks!

Need a bit of help...
So I’ve got this huge assembly in Creo that takes forever to open — like 30-40 mins easily. When I peeked into the task manager, I noticed it’s only using a single CPU core, even though the machines/workstations have quad-core and some even octa-core processors. Is this normal for Creo? Or is there some any setting or config tweak I may be missing that can make it use all cores and speed things up?
Many thanks in advance.

Ciao,
Srikar

Best answer by kdirth

Unfortunately, Creo is mostly a single core program.

 

Here is a collection of articles that discuss techniques for managing large assemblies:

Article - CS133707 - [Knowledge Hub] Creo Parametric - Large Assembly Management

3 replies

tbraxton
22-Sapphire II
tbraxton22-Sapphire II
22-Sapphire II
July 1, 2025

Creo Parametric is in general a single thread application. For loading models there is no way to enable multithreading within Creo AFAIK.

kdirth
21-Topaz I
kdirth21-Topaz IAnswer
21-Topaz I
July 1, 2025

Unfortunately, Creo is mostly a single core program.

 

Here is a collection of articles that discuss techniques for managing large assemblies:

Article - CS133707 - [Knowledge Hub] Creo Parametric - Large Assembly Management

There is always more to learn.
C
Chris321-Topaz I
21-Topaz I
July 1, 2025

Adding on, starting in Creo 11 there is a new performance reporting tool:

https://support.ptc.com/help/creo/creo_pma/r11.0/usascii/index.html#page/assembly/asm/using_performance_reporting.html 

 

In general these are poor performers:

 

  1. Family Tables
  2. Assembly level cuts (which are really family tables behind the scenes)
  3. Harnesses
  4. ECAD assemblies
  5. Large "general" patterns

See if you can eliminate any of those and or use interchange assemblies to swap out complicated assemblies for simpler representations. Attached is a PTC/User presentation that might be helpful.

    S
    SharmaKona-Adro10-MarbleAuthor
    10-Marble
    July 1, 2025

    Hey Mr. @Chris3 & @kdirth ,

    Thanks a lot for you support. This issue/question was eating our team`s brains almost since a week. Now it`s clear for all of us!!
    Much appreciate your efforts in addressing this.

    And of course, a special mention to @Chris3 & who ever created that presentation. It was smooth and pretty easy to understand. 

    Ciao,
    Srikar.

      S
      23-Emerald III
      StephenW23-Emerald III
      23-Emerald III
      July 1, 2025

      I spend most of my days in large assemblies and sometimes the wait time if significantly more than the work time, it can be extremely frustrating.

      There really is no one option that makes it all work faster but as mentioned, there are lots of tools within creo to improve the situation

       

      Any time we upgrade, I tend to try to evaluate config.pro options again, this is my current list of options (we are currently using Creo 8 to help our users who deal with large assemblies :

      I have tried to make notes to help with understanding but over the years, I have forgotten the reason why the option was added. I would suggest you read the documentation for each and thoroughly test each option to make sure it doesn't cause other problems for you or your company or your assemblies.  

       

      OPTION

      VALUE

      REASON

      allow_freeze_failed_assy_comp

      yes

      REQUIRED

      atb_auto_check_on_retrieve

      off

      this should be off, it is on by default

      auto_place_max_number

      1

      this has to do with auto placement of interface components and can slow down assy of hardware with interface enabled

      auto_regen_views

      no

      REQUIRED - you must manually regen sheets/views, otherwise it causes significant delays

      autoplace_single_comp

      no

      Autoplace interface components can significantly slow assy times

      check_interference_of_matches

      no

      it is possible this option can slow assy times when set to yes (default it yes)

      comp_assemble_with_interface

      none

      comp assy is an interface option that may significantly slow assy times

      create_temp_interfaces

      no

      temporary interfaces can significantly impact assy performance

      enable_auto_regen

      no

      enable auto regen Yes (default) has potentially negative large assy effects

      fasthlr

      no

       

       

      unknown effects

       

       

      interface_quality

      0

      this option when set to anything other than zero can seriously affect print time. It is really for PLOTTING, where a pen would got over and over  the same line.

       

       

      open_simplified_rep_by_default

      yes

      recommended so you don't accidentally open the master rep on a large assy

      shade_quality

      3

      shade quality is EXTREMELY DETRIMENTAL TO LARGE ASSY PERFORMANCE

      smooth_lines

      no

      unknown effects

       

       

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        SharmaKona-Adro10-MarbleAuthor
        10-Marble
        July 2, 2025

        Hey there @StephenW,

        The comment you mentioned looks precisely detailed. Let me try this and I`ll get back to you on how it worked for me and then possibly we may discuss a bit more in depth !

        S
        23-Emerald III
        StephenW23-Emerald III
        23-Emerald III
        July 2, 2025

        @SharmaKona-Adro  Yes, definitely. Just keep posting on this thread. Anything you find will very likely help me and others also.

        I did just notice that in my post, the editor converted  Creo "8" to an emoji. But I do have access to Creo+ (creo 12) to test new options too.

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