Is there a Java library for accelerated vector computations?

Question

I'm looking for a Java lib that permits to do some fast computations with vector (and maybe matrices too).

By fast I mean that it takes advantage of GPU processing and/or SSE instructions. I'm wondering if it can be possible to find something more portable as possible. I recognize that the JVM provides a thick abstraction layer of the hardware.

I've come across JCUDA, but there's a drawback: on a computer without an Nnvidia graphic card it should be run in emulation mode (so I come to believe it will be not efficient as expected). Has anyone already tried it?

Answer 1

What about OpenCL? It should provide you a good starting point for this kind of optimized operations.

There exist many bindings for Java, starting from jocl (but take a loot also at JavaCL or LWJGL that added support from 2.6)

Answer 2

If by fast you mean high speed rather than requiring support for your particular hardware, I'd recommend Colt. Vectors are called 1-d matrices in this library.

Answer 3

I'd recommend using UJMP (wraps most if not all of the high-speed Java matrix libraries) and wait for a decent GPGPU implementation to be written for it (I started hacking it with JavaCL a while ago, but it needs some serious rewrite, maybe using ScalaCLv2 that's in the works).