A collection of extensions by @malgam
http://malsandbox.tiddlyspot.com
The "loadnew" plugin provides the JavaScript module $:/plugins/malgam/loadnew/loadnew.js that implements an incremental load command for Tiddlywiki 5.
The javascript code is based on the built-in module $:/core/modules/commands/load.js that loads tiddlers from a Tiddlywiki file into a node.js Tiddlywiki instance. This command loads all non-system tiddlers, irrespective of whether they have been modified since last loaded. As a result, all tiddlers in the node.js tiddlers folder will end up with a new modification date.
In contrast, the loadnew command only loads tiddlers that either don't already exist in the tiddlers folder, or have a newer modified date than the existing tiddler.
With a backup strategy that uses a file system snapshot process to preserve historical versions of tiddlers, the loadnew command minimises the sizes of the resulting snapshots.