Re: gcj performance on Solaris 2.6

[Jeff Sturm <jsturm at one-point dot com>]

On Wed, 25 Jul 2001, Van Nguyen wrote:
> I followed the installation instructions for gcj 3.0.  Then run a few Java 
> benchmarks on gcj, and compared them to the results I got from using Sun 
> JDK 1.3.  gcj is considerably slower than JDK 1.3.   For example, running 
> Sieve on java 1.3 on Sieve, I got around 18600 iterations per 10 seconds. 
> gcj gave me 3200 iterations.

I don't see that, with the Sieve.java I have:

$ gcj -O3 -funroll-loops Sieve.java --main=Sieve -o sieve
$ ./sieve
Running Sieve benchmark.
This will take about 10 seconds.
25063 iterations in 10.0 seconds
Sieve score = 2506

$ javac Sieve.java                        
$ java Sieve                              
Running Sieve benchmark.
This will take about 10 seconds.
13627 iterations in 10.0 seconds
Sieve score = 1363

However I am comparing to JDK 1.2.2 on Solaris 7.  What optimizer flags
did you try?

> I used the Sieve program from ftp://gonzalez.cyberus.ca/pub/Linux/java/, 

This host is unreachable for me.  You get get the one I use at:

http://www.one-point.com/~jsturm/Sieve.java

Jeff