Improve performance of "Data Buckets" -> Documents page

Background
When a user goes to the Data Buckets tab in the web UI and clicks Documents button for a specific bucket, the first 5 documents are listed by default.
Even though only the beginning of each document is shown, we still parse the entire content behind the scenes.

Problem
When documents are big, the time it takes to parse and display them on the page may grow.
We recently observed page load times of 20 seconds and more for 25KB documents.
Changing the number of displayed documents from 5 to a bigger number leads to a further increase in the page load time.

Request
Have an option to disable parsing of the entire document.