More Eecient Object Serialization Ternational Workshop on Java for Parallel and Distributed Com- Puting

In current Java implementations, Remote Method Invoca-tion is too slow for high performance computing. Since Java's object serialization often takes 25%{50% of the time needed for a remote in-vocation, an essential step towards a fast RMI is to reduce the cost of serialization. The paper presents a more eecient object serialization in detail and discusses several show-stoppers we have identiied in Sun's oocial se-rialization design and implementation. We demonstrate that for high performance computing some of the oocial serialization's generality can and should be traded for speed. Our serialization is written in Java, can be used as a drop-in replacement, and reduces the serialization overhead by 81% to 97%.