ID 373218 - Slow performance when transforming a Prototype mesh using a low Display Density in a Replicator

Problem summary
Transforming a Prototype mesh is slow in performance when using a low Display Density in the properties of a Replicator. The performance drop is significantly noticed using a large number of replicas. Additionally, turning off the Replicator does not give any increase in performance when replicas are not drawn in the scene. However, there is no performance drop when transforming the Prototype mesh to manipulate a large number of replicas in older versions of Modo 

Customer reported version
Modo 12.2v1 

Customer reported platform
n_a_mac

Steps to reproduce

1) Open the attached scene. The scene contain a Mesh, a Replicator item and a Particle Cloud item. 

2) Select the Prototype item "Source Mesh" in the Item list. 

3) Change to Polygon mode and translate the Prototype item. 

4) Translating the Prototype item to manipulate replicas in the scene is now very slow. 

5) Now disable the Replicator item and translate the Prototype item again. Performance is still slow when the replicas are not drawn in the scene. Also, if removing the Prototype "Source Mesh" from the Replicator the performance is increased. 

Workaround
Unknown. 

Reproduced by support

This bug has been reproduced in:
Modo 12.2v1 - MacOSX 11.13 - Windows 10 
Modo 12.1v2 - MacOSX 11.13 
Modo 12.0v1 - MacOSX 11.13 - regression

Unable to reproduce bug in:
Modo 11.2v3 - MacOSX 11.13 - Windows 10 

Note: Testing in Modo 701 also resulted in good performance. 

Earliest version tested
Modo 11.2v3 - This issue no longer appears in this version and has regressed.

Expected behaviour
Transforming a Prototype mesh should not slow the performance when using a low Display Density in a Replicator. 

Actual behaviour
Performance is significantly slow when transforming a Prototype mesh with a low Display Density in a Replicator.