HWBOT Prime is a Java-based benchmark that calculates as much prime numbers in a given time frame. It is developed by HWBOT and available for Windows, Linux and Android systems. It's been used by Raspberry Pi overclockers to see how far they can push the little device. The current top scores for the Raspberry Pi generation are 849.52 PPS at 1.62GHz RPI 1 and 2025.77 PPS at 1.5GHz RPI 2, both LN2 cooled. On Windows and Linux, the Java JDK version plays a major role in the performance efficiency.
In a forum thread, Speed.fastest from Indonesia shared his findings testing two new Early Access beta versions of Java JDK9. Both Build 106 and 107 come with a healthy performance improvement in the HWBOT Prime benchmark. A couple of forum members chimed in with test results and confirm the performance increase. Digg_de, for example, improved his Skylake 6700K 4.5GHz result from 6356 to 6725 PPS. Nice!
For more information and discussion, check out the forum thread here.