Provides public methods to get the percentage for the fill and trim
task. These can be used by 3rd party plugins to get the calculated
percentage or get the values of the processed/total amount of chunks.
Possible usages I have in mind:
- Boss bar showing a progress of the fill task
- Action bar showing the status
- ...
This option isn't made available to change through a command as most people shouldn't change it. It's been made available for people who are running extremely low memory (and thus necessarily tiny) servers which have less than 768 MB memory available to their CraftBukkit server.
This option was mainly added for people wanting to follow Mojang's recommendation to load all important world chunks in 1.6.3 - 1.6.4 before updating to the eventual 1.7 release to prevent errors with structures such as witch huts and nether fortresses:
https://mojang.com/2013/09/minecraft-snapshot-13w37a/