Bytecode weaving

Artemis-odb can be augmented through bytecode instrumentation and weaving. These facilities are provided via the maven plugin, gradle plugin and the Command Line Tool. Annotations are commonly used for more granular control, but no other considerations, code-wise, are required in order to use these features.

The bytecode weaving features work directly on the compiled classes, it is not (yet) possible to apply the transformations at runtime via an agent.

Maven plugin/CLI features

• Optimizing Entity Systems, decreasing artemis' overhead by 25-30% in most scenarios.
• Transmute vanilla component types
  • @PackedWeaver allocates components contiguously in memory.
  • @PooledWeaver recycle object instances to mitigate garbage collection stutter.
• Generate a project overview with the Component Dependency Matrix.
• Inject custom logging classes into entity systems with @Profile.