How do I improve my loop concat performance

Problem

Loops are performing poorly to generate a String via concatenation.

Possible Solutions

If you are using pub.string:concat in your loops to create larger loops then consider the use of StringBuffers.
You'll need to write some java services to:

create a StringBuffer object and put it in the pipeline (call this before the loop)

call append on a given StringBuffer passing in a supplied String (used inside the loop)

call toString() on the StringBuffer to get the resulting String (call this after the loop)

How do I improve my loop concat performance

Problem

Possible Solutions

Other links: