32 Bits Java ((free)) ❲Ad-Free❳

Proceedings of the 8th ACM/SPEC on International Conference on Performance Engineering (ICPE '17) – but a more directly applicable, freely available technical report is:

By: Dr. Heinz Kabutz, JavaSpecialists.eu (2018) 32 bits java

"Java's 32-bit vs. 64-bit Performance: An Empirical Study" Proceedings of the 8th ACM/SPEC on International Conference

It shows benchmarks for SPECjvm2008 on Windows/Linux, confirming that 32-bit can outperform 64-bit for CPU-bound tasks due to reduced memory traffic. 32 bits java