8000 Migrate one-shot classloading to hidden classes · Issue #8837 · jruby/jruby · GitHub
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Migrate one-shot classloading to hidden classes #8837

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headius opened this issue May 13, 2025 · 0 comments
Open

Migrate one-shot classloading to hidden classes #8837

headius opened this issue May 13, 2025 · 0 comments
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JRuby 10.1.0.0

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@headius
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headius commented May 13, 2025

In Java 15, the MethodHandles.Lookup class gained the ability to define hidden classes

By using this feature for our one-shot classloaded classes, like JIT methods, we should be able to reduce the memory overhead of each class, since they will not drag along a full classloader and all the metadata associated with a non-anonymous class.

This could also reduce metaspace usage and overall memory usage of JRuby when using JIT to compile Ruby code.
@headius headius added this to the JRuby 10.1.0.0 milestone May 13, 2025
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