Does Java have any way of auto vectorization? On modern CPUs SIMD can speed up numerical computation several times easily. However auto vectorization is hard in general, so compilers don&#x27;t necessarily do a good job and manually optimized code is common. C++ has TMP and libraries such as Eigen use TMP to provide a nice interface to SIMD optimized code. I don&#x27;t know whether Java has equivalent of compiler intrinsics for SIMD instructions, without which Java code would be far slower for many numerical computation. I believe C# has plans to add an abstraction for SIMD and Mono can already emit SIMD instructions.