XCache is a free and open source PHP opcode cacher. Using xCache you can have better performance of your PHP scripts execution on your linux vps. It can achieve this by eliminating the compilation time of PHP code by caching the compiled version of the PHP code into the memory and later uses the compiled version of the code. This can significantly accelerate the page generation time by up to 5 times faster and also optimizes and increases many other aspects of php scripts and reduces the server load.