ETHERPAD: Running out of memory when viewing history of a big document

[tiblu]

Overview

When scrolling through a big documents history in the timeline view, Etherpad consumes a huge amount of memory.
Tho the issue itself is not a problem in etherpad-lite-heroku project, the investigation should be done as a part of the project.

TODO

• What consumes the memory in Etherpad?
• Can we fix and PR the issue to https://github.com/ether/etherpad-lite