Suggest conducting research on Loro and the operating principles of Loro's DiffCalculator.

[JOOHOJANG]

Description: Suggest conducting research on Loro and the operating principles of Loro's DiffCalculator.

Why:
Loro is currently one of the leading CRDT libraries.

It is implemented using the REG idea. For more details, refer to the link below.
https://loro.dev/docs/advanced/replayable_event_graph
https://loro.dev/docs/advanced/version_deep_dive
https://loro.dev/blog/loro-richtext
https://codepair.yorkie.dev/jooho/6693b8536137c62378879e57/share?token=4h1ma (summarization of loro (in korean))

The benefits of applying REG include:

1. Removing tombstones to free up memory
2. Eliminating coordinate systems like CRDTXXXPos in Yorkie
3. Fast time travel
4. …

Anyway, the point I want to make is:

Loro uses an Oplog to record changes and versions, and updates are done by calculating the difference between two versions and applying it to the state. DiffCalculator is responsible for calculating the difference between two versions. The logic is complex and difficult to understand, but if we can analyze it properly, it might help us determine whether we can apply the REG idea to Yorkie.