I wrote yet another version of benchmark.m, thanks to the feedback I

received from some of you.

Now it should be more accurate, because the time is measured in chunks

of around 3 seconds, so most overheads should become negligible on

every machine. There are more tests and a general performance index

made from the geometric mean of the individual test indexes. The

indexes are relative to a Sun Sparc 2. The problems with the time

measurements should have gone away. The total virtual memory needed

is around 10M, while the RSS tops at around 6M.

Evan Thomas pointed out that, while the Sparc2 may be a good reference

point because of its standard configuration and its relative slowness,

it will be increasingly difficult to find, so reference numbers could

be hard to get for future tests. If anyone comes up with a better

refererence machine, we can move from Sparc2.

Here are the numbers we get for Alpha and 50MHz Intel. Notice that

for Alpha I can usually get performance indices around 7, but I got

6.1 once, because the machine is always heavily loaded. I'd like to

collect more benchmark results form you. I will post them when I have

some.

Francesco Potorti` <

[hidden email]>

DEC Alpha 2100

Octave benchmark version bm 1.3

Speed of octave 1.1.1 on alpha-dec-osf1.3 relative to Sun Sparc 2

Matrix inversion (LAPACK) 9.24 +/- 4.2% (49 runs)

Schur decomposition (LAPACK) 8.41 +/- 1.3% (14 runs)

Differential equation (LSODE) 5.49 +/- 4.3% (14 runs)

Fourier transforms (FFTPACK) 6.79 +/- 2.4% (35 runs)

for loop 6.43 +/- 0.9% (21 runs)

-- Performance index (bm 1.3): 7.1

Michael Smolsky <

[hidden email]>

intel 486dx2-50 20MBt ram, 256 cache linux box

Octave benchmark version bm 1.3

Speed of octave 1.1.1 on i486-unknown-linux relative to Sun Sparc 2

Matrix inversion (LAPACK) 0.74 +/- 13.3% (140 runs)

Schur decomposition (LAPACK) 0.67 +/- 14.5% (40 runs)

Differential equation (LSODE) 1.37 +/- 6.0% (40 runs)

Fourier transforms (FFTPACK) 0.48 +/- 2.2% (35 runs)

for loop 1.53 +/- 8.9% (60 runs)

-- Performance index (bm 1.3): 0.87