RESTful Web services play important role in distributed web applications. Performance of Web services affects overall performance of applications. Using features of REST, HTTP, and the REST frameworks like Jersey, Restlet, RESTEasy the latency and system resource consumption of application is improved. Performance of RESTful web services is improved using techniques such as fast manipulation of strings, streaming large representations, compressing SOAP response, partial representation, using caching techniques and using conditional methods. It is observed that performances of RESTful Web services increases by approximately 40% if above techniques are used.