Lightweight in obj-browse

Select to have the embedded pages for the selected instances use lightweight lists for better performance. 

1.  As a best practice, select this checkbox. This can reduce memory requirements during processing.
2. Having the embedded pages use lightweight lists does not affect your ability to remove an embedded page completely (with the Obj-Filter or Page-Remove method).
3. Two dynamic system settings control the use of lightweight lists by the Obj-Browse method. There is a setting each for PRPC and application rules:

• clipboard/lightWeightList/enableForCorePRPCRules - this is set to true by default.
• clipboard/lightWeightList/enableForCustomerRules - this is set to false by default.

When true, these dynamic system settings override the Use Lightweight List checkbox setting on the Activity rule form.

Reference Links:

https://pdn.pega.com/sites/pdn.pega.com/files/help_v71/methods/obj-browse/obj-browse.htm