For completeness and to not miss anything obvious,

Side note: the script cannot select anything. I previously used a command 
to run the PolyCleanup tool. Although it finds NGons in a microsecond, it 
doesnt give me a list, it selects them.

What about selecting, and running cmds.ls(selection=True) afterwards? If 
you restore your selection afterwards, this would give you a list in that 
microsecond.

On Wednesday, 7 September 2016 00:08:29 UTC+1, Chad_Fox wrote:

Hi All
>
> I recently started diving into OpenMaya to write a faster NGon check, but 
> my results are still too slow @ 5.5 seconds in a 500k Polygon scene. 
>
> I'd like to ask for any recommendations you can offer on how to improve 
> this check script, if possible.  
>
> Side note: the script cannot select anything. I previously used a command 
> to run the PolyCleanup tool. Although it finds NGons in a microsecond, it 
> doesnt give me a list, it selects them. 
>
> Thoughts?
>
> import maya.cmds as cmds
> import maya.OpenMaya as om
>
> violationPolygons = []
>
> mIt_kMesh = om.MItDependencyNodes( om.MFn.kMesh )
>
> while not mIt_kMesh.isDone():
>     mObject = mIt_kMesh.thisNode()
>     
>     dagPath = om.MDagPath.getAPathTo( mObject )
>     
>     mFnMesh = om.MFnMesh( dagPath )
>     mObject_numFaces = mFnMesh.numPolygons()
>     
>     for faceID in range(0, mObject_numFaces ):
>         mIntArray = om.MIntArray()
>         mFnMesh.getPolygonVertices( faceID, mIntArray )
>         
>         if mIntArray.__len__() > 4:
>             if not dagPath.fullPathName() in violationMesh:
>                 violationMesh.append( dagPath.fullPathName() )
>             violationPolygons.append( '%s.f[%d]' %( dagPath.fullPathName
> (), faceID ) )
>                             
>     mIt_kMesh.next()
>     
> cmds.select(violationPolygons)
>
> ​

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