[1.20.1] Optimise BiomeConfig #5514
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- Use `Map.entry()` instead of `Pair.of()` as the former tells Java it will never be null and never be changed. - Use `Map.ofEntries()` instead of HashMap for the same reason. Reduces memory usage and improves performance by letting the map be exactly sized and strongly immutable. - Use the deferred class idiom instead of a couple of mutable fields. Allows the map to be stored in a static final and skips the need for an init check. Static finals are faster to load than normal static fields.
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Map.entry()instead ofPair.of()as the former tells Java it will never be null and never be changed.Map.ofEntries()instead of HashMap for the same reason. Reduces memory usage and improves performance by letting the map be exactly sized and strongly immutable.