Heavy Performance Issue When Query MassOverridden

[c_hoppen]

Hello,

I have stumbled across a pretty heavy performance problem. It seems that the query of MassProperties.MassOverridden leads to a recalculation of the mass.

Have a large assembly open (around 2,000 files  or more). Run the code below. In my case I have 2381 files open and the code takes about 2 minutes (i9-9900k, 32 GB RAM, SSD)

Sub Main()

Dim assmDoc As AssemblyDocument
Set assmDoc = ThisApplication.ActiveDocument

Dim assmDef As AssemblyComponentDefinition
Set assmDef = assmDoc.ComponentDefinition

Dim massProps As MassProperties
Set massProps = assmDef.MassProperties

Dim isOverridden As Boolean
isOverridden = massProps.MassOverridden

End Sub

 Inventor 2022.3.2 Build 350.

Is this a known issue?

Thanks

Christoph

[bradeneuropeArthur]

Sub Main()

Dim assmDoc As AssemblyDocument
assmDoc = ThisApplication.ActiveDocument

Dim assmDef As AssemblyComponentDefinition
assmDef = assmDoc.ComponentDefinition

Dim massProps As MassProperties
massProps = assmDef.MassProperties

massProps.CacheResultsOnCompute = False

Dim isOverridden As Boolean
isOverridden = massProps.MassOverridden

MsgBox (isOverridden)

End Sub

Use this!

"

oMassProps.CacheResultsOnCompute = False

" 

[c_hoppen]

CacheResultsOnCompute = False

doesn't make a difference! Same time consumption!

I measured the influence of the two settings on the query time:

CacheResultsOnCompute = False is faster, but waiting one minute for a "yes or no" ist still unacceptable.

[bradeneuropeArthur]

Is there any other kind of coding used in your company via i-logic VBA Vb.net etc that runs parallel?

[bradeneuropeArthur]

Do you have the option calculate mass for assemblies and parts on save on?
You can find the application options.

[c_hoppen]

---

@bradeneuropeArthur  schrieb:

Is there any other kind of coding used in your company via i-logic VBA Vb.net etc that runs parallel?

---

No.

[c_hoppen]

---

@bradeneuropeArthur  schrieb:

Do you have the option calculate mass for assemblies and parts on save on?
You can find the application options.

---

No, it's Part Only.

To make it clear: I don't want to calculate the mass. I just want to know if the mass in the top assembly is overridden. The answer should be a quick "yes or no" and not "let me think about it some minutes".  

[bradeneuropeArthur]

I know, but with this option on the mass is already calculated on forehand, which seems to be the issue with your models.
I think that inventor needs first to update the mass before it will know if it is overwritten or not.
The mass properties are a bit special properties which is hard to explain and complex.
Maybe you can first test if this option on is solving your problem, because I personally have no issue with large assemblies and your code.

[c_hoppen]

---

@bradeneuropeArthur  schrieb:
I know, but with this option on the mass is already calculated on forehand, which seems to be the issue with your models.

---

I tried it with several other Assemblies having more than 1.000 unique files loaded an the result is always the same.

(with massProps.CacheResultsOnCompute = False)

Maybe you can first test if this option on is solving your problem, because I personally have no issue with large assemblies and your code.

---

What is large to you? 

My first sample is the Express Mode Demo "Osgood" from 2015 (55 sec.)

I did a test with the "Material Process Line" Sample having 1263 files and it takes about 23 seconds.

Another sample was the "Large Assembly Sample" coming with the Adesk Poket Demos (31 sec.)

In contrast to the first example, the last one is faster, because in the first one the geometries are much more complex.

For me there is no reason to do any calculation, only to find out if a bool value is true or false.

Christoph