HTML version of Scripted Foils prepared June 3 97

Foil 61 What Limits Performance of Compiled Java?

From And the Future is ........: The Use of Java and the Web in Scientific Computing Hefei Computational Science and Beijing Web Tutorial -- May 27 and 30 1997. by Geoffrey C. Fox *

1 Syracuse Workshop saw no serious problem to High Performance Java on sequential or Shared Memory Machines
2 Some restrictions are needed in programming model
3 For instance, Avoid Complicated Exception handlers in areas compilers need to optimize!
4 Should be able to get comparable performance on compiled Java C and Fortran starting with either Java Language or JavaVM bytecodes
5 The Interpreted (Applet) JavaVM mode would always be slower than compiled Java/C/Fortran -- perhaps by a factor of two with best technology

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