%T Mobile-Agent versus Client/Server Performance: Scalability in an Information-Retrieval Task %A Robert S. Gray %A David Kotz %A Ronald A. Peterson %A Peter Gerken %A Martin Hofmann %A Daria Chacon %A Greg Hill %A Niranjan Suri %R Technical Report TR2001-386 %I Dartmouth College, Computer Science %C Hanover, NH %D January 2001 %U http://www.cs.dartmouth.edu/reports/TR2001-386.ps.Z %X Mobile agents are programs that can jump from host to host in the network, at times and to places of their own choosing. Many groups have developed mobile-agent software platforms, and several mobile-agent applications. Experiments show that mobile agents can, among other things, lead to faster applications, reduced bandwidth demands, or less dependence on a reliable network connection. There are few if any studies of the scalability of mobile-agent servers, particularly as the number of clients grows. We present some recent performance and scalability experiments that compare three mobile-agent platforms with each other and with a traditional client/server approach. The experiments show that mobile agents often outperform client/server solutions, but also demonstrate the deep interaction between environmental and application parameters. The three mobile-agent platforms have similar behavior but their absolute performance varies with underlying implementation choices. %Z Revised version appeared in Mobile Agents 2001. See here.