spamming commands makes maya suspend for a while

**Describe the bug**
If in your scene you have lots of nurbsCurves and you reveal it in outliner maya will start suspend on some of the actions (expanding hierarchy in outliner, deleting polygons, isolating objects)

**Steps to reproduce**
1. Turn on EchoAll in scriptEditor
2. create one nurbsCurve
3. isolate it
4. you will see that command, note it `ls -type mayaUsdProxyShapeBase -long`
5. exit isolate
6. create more of nurbs curves (x100 times)
7. select anything and go to isolate (you will notice that this time maya will hang for a while)
8. Check script editor - you will be getting around 100x messages