More Eecient Object Serialization

In current Java implementations, Remote Method Invocation is too slow for high performance computing. Since Java's object serialization often takes 25%{50% of the time needed for a remote invocation, an essential step towards a fast RMI is to reduce the cost of serialization. The paper presents a more e cient object serialization in detail and discusses several show-stoppers we have identi ed in Sun's o cial serialization design and implementation. We demonstrate that for high performance computing some of the o cial 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%.