Very often in the solutions we do for our customers (see Consulting services we provide) we suggest and use the Cache macro from Appfire.

It works well for us and our customers. Especially on "heavy pages" like reporting pages and pages that aggregate and show lot's of ConfiForms data

See more on Appfire's website https://www.appfire.com/resource/how-vertuna-llc-improves-page-performance-and-load-times-on-data-heavy-confluence-pages/