Shrubbery shrub ShrubberyGROUND

causes a static field lookup. If "GROUND" were a static final int, the compiler would treat it as a known constant and inline it.

The flip side, of course, is that with enums you get nicer APIs and some compile-time value checking. So, the usual trade-off applies: you should by all means use enums for public APIs, but try to avoid them when performance matters.

In some circumstances it can be helpful to get enum integer values through the ordinal() method. For example, replace:

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