[Biojava-l] Java VM performance.

[Smithies, Russell]

I just read an interesting article that re-ran the benchmark tests for
Java vs. C++. 
http://www.sys-con.com/story/?storyid=45250
According to the author, Keith Lea, "..no one should ever run the client
JVM when given the choice" and "..the Server VM is much faster than the
Client VM,".

Some simple editing of jvm.cfg will cause the server VM to be run for
all applications, unless they are run with the -client argument.

Performance rating (bigger is better)
                     G++ 3.3.1             Java 1.4.2 
               Intel 386 Intel 686  Server JVM    Client JVM 
Ackermann            73%      114%        129%          N/A* 
Fibonacci            88%      101%        132%          88% 
Hash2                79%       77%        168%         115% 
Hash                194%      193%        402%          36% 
Heapsort            101%      104%         94%          99% 
Matrix              157%      155%        111%          54% 
Method call          89%      105%        871%          54% 
Nested loop         165%      138%         89%          64% 
Object creation      62%       65%        241%         215% 
Random no. gen.     145%      204%        102%          54% 
Sieve                97%       98%        107%          97% 
String concatenation 99%      137%         94%          82% 
Sumcol              101%      108%        138%          72% 
Word count           88%       91%        128%          99% 

*The Client JVM could not run the Ackermann test 
  without producing a StackOverflowError.




Russell Smithies

Bioinformatics Software Developer
AgResearch Invermay
Private Bag 50034
Puddle Alley
Mosgiel
New Zealand
Tel: +64 3 489 9171
Fax: +64 3 489 3739


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