Feedback on Panama from ECS engine in Java 25

[Felipe Yelpo]

Hi all,

I'm currently developing an ECS engine in Java 25, built (thanks to)
Project Panama's MemorySegment/Arena model, using the Vector API for
operations. It uses SoA chunked layouts of off-heap memory based around CPU
cache sizes detected by OSHI. No JNI at all.

Some benchmarks I just ran on an i5 11400f with 256KB chunks:

- SIMD operations over 2M entities across 2 float[4] components came to
around ~60ns per entity.

- 65.536 entities added in 16ms.

The project is private for now (just ~1 month in), but I’d be happy to
share architectural insights or isolated benchmarks.

Thanks — these APIs are game-changing, and frankly the only reason I'm able
to do this in Java.

- Felipe Yelpo

Feel free to reach out: www.linkedin.com/in/felipe-yelpo-3b547a317
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