32-bit means you have at most 4 gigs of address space to play with; pron implied that lower memory usage is the key savings of fibers vs threads, so I assume a

32-bit means you have at most 4 gigs of address space to play with; pron implied that lower memory usage is the key savings of fibers vs threads, so I assume a 32-bit JVM will hit a memory limit a lot sooner.