A mobile ad-hoc networks is an autonomous which is formed without any centralized infrastructure where node move arbitrarily in the dynamically change in topology. A node establishes a temporary connection where nodes can join or leave the networks at any time. These networks have quite a many constrains because of uncertainty of radio interface and its limitations. In recent years, a variety of new routing protocols has been implemented to compare for their performance. In this performance of the networks has been analyzed for the different packet size with varying pause time in terms of metrics: throughput, average end-to-end delay, average jitter for AODV and DSR routing protocols.