Optimized OpenJDK builds for riscv64 architecture!
Most popular ways of installing the JDK do not provide riscv64 builds. If they are provided (such as via debian or ubuntu), as of 2023, those are with the "Zero VM" which runs in interpreted mode. That mode offers terrible performance.
As of Java 19, the JIT compiler has been ported to risv64, providing significant performance boosts compared to the "Zero VM".