Java Edition 1.15 Pre-release 4

1.15 Pre-release 4 (known as 1.15-pre4 in the launcher) is the fourth pre-release for Java Edition 1.15, released on December 3, 2019.

General

 * Performance
 * Performance improvements.

Video
Video made by slicedlime:

Trivia

 * Like the first and third pre-release but unlike the second one, this version name has a lowercase "r" in-game.