hello?

Tom Tromey tromey@cygnus.com
Fri Oct 9 15:04:00 GMT 1998


Shane> Now, I don't know anything about HPCJ, and this result makes
Shane> absolutely no sense to me, but what kind of performance should
Shane> we expect from GCJ as compared to JDK 1.1.6 with a JIT?
I don't have a JIT here, as far as I know. I'm using JDK 1.1.5 on
my Linux box for comparisons.
When I run our "Linpack" test under `java', I get answers like this:
Mflops/s: 1.99 Time: 350 msecs Norm Res: 1.33 Precision: 2.220446049250313E-16
When I run the compiled version I get:
Mflops/s: 6.3 Time: 110 msecs Norm Res: 1.14 Precision: 2.220446049250313E-16
I compile with `-g' and no optimization.
So for this example the compiled code is 3x as fast.
Of course, this is highly application dependent.
Tom


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