OVERLAPPING EXECUTION WITH TRANSFER USING NONSTRICT EXECUTION FOR MOBILE PROGRAMS

In order to execute a program on a remote computer it must first be tr ansferred over a network. This transmission incurs the overhead of net work latency before execution can begin. This latency can vary greatly depending upon the size of the program, where it is located (e.g., on a local network or across the Internet), and the bandwidth available to retrieve the program. Existing technologies, like Java, require tha t a file be fully transferred before it can start executing. For large files and low bandwidth lines, this delay can be significant. In this paper we propose and evaluate a non-strict form of mobile program exe cution. A mobile program is any program that is transferred to a diffe rent machine and executed The goal of non-strict execution is to overl ap execution with transfer allowing the program to start executing as soon as possible. Non-strict execution allows a procedure in the progr am to start executing as soon as its code and data have transferred To enable this technology, we examine several techniques for rearranging procedures and reorganizing the data inside Java class files, Our res ults show that nonstrict execution decreases the initial transfer dela y between 31% and 56% on average, with an average reduction in overall execution time between 25% and 40%.