C++ Interpreter

steve goldman Steve.Goldman at sun.com
Mon Nov 26 13:04:41 PST 2007

Volker Simonis wrote:
> If you are interested in a performance comparison between the C++ and
> the Template Interpreter you may want to read the following blog:
> http://weblogs.java.net/blog/simonis/archive/2007/11/template_vs_cin_1.html
> "Template- vs. C++-Interpreter shootout: This blog discusses the main
> differences between the C++ and the Template Interpreter which are
> both available within the Hotspot sources of the OpenJDK project. Some
> performance tests with the DaCapo benchmark suite which compare the
> two interpreters in mixed and interpreted mode on Linux/x86 and
> Solaris/SPARC conclude the presentation."

Very cool. So the results are much different (worse) for Xmixed than I 
got in the long distant past. Server has certainly changed a lot in the 
interim. So what compiler did you use on Solaris? Considering how 
similar the numbers are between x86/sparc for -Xint it would seem that 
you might have used gcc. I used to see worse behavior on sparc because 
with gcc the interpreter could do the computed goto trick for the 
dispatch loop and that is worth a lot.

Second if you have the time it would interesting to see the comparison 
using client.


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