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Language Extensions

These extensions allow you to code in languages other than JavaScript, and some even have performance benefits.


To install jsmacros extensions, place the jar files in the .minecraft/config/jsMacros/LanguageExtensions/ folder.


Everything's faster than JavaScript, except wasm/groovy interop

Jython, Lua and Ruby will have a good performance benefit for most tasks.
Plus, their threading scheme for launguage contexts works better, so you can have true async.

JEP/Groovy's good until you try to access a lot of different Java objects.
but jep can be a pain to install, and has threading concerns like js

Kotlin is faster, but is more strongly typed and null-checked, so it may be harder to write valid scripts in.

WASM/WASI is a joke.
have you seen its java interop code.


for debugger attaching in js, see JsMacros Debugging