A huge increase in Java's FFM allocation performance will appear in JDK28! We've worked hard on this one.
Spoiler alert: ~10x speedup on most platforms for a very common use case.
inside.java/2026/10/05/c...
inside.java
Making Arena.ofConfined() Even Cheaper in JDK 28 - Inside.java
Pooled confined arenas provide a significant performance improvement for short-lived native allocations.