A high performance and high quality pseudorandom number generator is presented in this paper. It takes less than one clock cycle to generate a pseudorandom byte on an Intel core i3 processor and passes all the 6 TestU01 batteries of tests. The generator can work in either deterministic mode or non-deterministic mode. When working in deterministic mode, it can be used for high speed data encryption and in other applications that require deterministic and reproducible pseudorandom sequences. When working in non-deterministic mode, the generator behaves much like a true random number generator, but with the advantages of low cost, high performance, and general availability. It is good for many applications that currently rely on true random number generators