Basic HTML version of Foils prepared May 6 1997

Foil 10 What Limits Performance of Compiled Java?

From Master Presentation on Java for Simulation and Education Penn State Jan 13,Wright State Jan 27,SIAM March 16 1997 -- January 1997. by Geoffrey C. Fox
Rice Java Compilation Talk December 96
Syracuse Workshop saw no serious problem to High Performance Java on sequential or Shared Memory Machines
Some restrictions are needed in programming model
For instance, Avoid Complicated Exception handlers in areas compilers need to optimize!
Should be able to get comparable performance on compiled Java C and Fortran starting with either Java Language or JavaVM bytecodes
The Interpreted (Applet) JavaVM mode would always be slower than compiled Java/C/Fortran -- perhaps by a factor of two with best technology

Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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