In NCMP, CM handles are saved using a CpsDataService method called saveListElementsBatch. This method has very poor performance compared to saveListElements.

Comparing the two methods:

void saveListElements(String dataspaceName, 
                      String anchorName, 
                      String parentNodeXpath, 
                      String jsonData, 
                      OffsetDateTime observedTimestamp);

void saveListElementsBatch(String dataspaceName, 
                           String anchorName, 
                           String parentNodeXpath, 
                           Collection<String> jsonDataList, 
                           OffsetDateTime observedTimestamp);

saveListElementsBatch takes a collection of JSON, with one list element in each JSON:

{ "list-name": [ "element1": ... ] }
{ "list-name": [ "element2": ... ] }
{ "list-name": [ "element3": ... ] }

This has extremely poor performance, as the Yang parser is invoked for every item in the collection.

By comparison, saveListElements supports saving multiple list elements in a single batch, by wrapping the list elements in a single JSON array: 

{ "list-name": [ "element1": ..., "element2": ..., "element3": ... ] }

This task is to change NCMP to use saveListElements, and remove the not needed saveListElementsBatch code.