speed of statistics.m

[Francesco Potorti`]

I do not know whether this is a Debian problem or maybe corrected, but
in Debian, using Octave from testing and from unstable I see that,
contrary to my expectations, statistics is much slower in Octave 3.1:

octave3.0> version
ans = 3.0.1
octave3.0> t=cputime;statistics(1:35000);cputime-t
ans =  0.26002
octave3.0> t=cputime;statistics(1:35000);cputime-t
ans =  0.26001
octave3.0> t=cputime;statistics(1:35000);cputime-t
ans =  0.25602


octave3.1> version
ans = 3.1.51
octave3.1> t=cputime;statistics(1:35000);cputime-t
ans =  1.7001
octave3.1> t=cputime;statistics(1:35000);cputime-t
ans =  1.7161
octave3.1> t=cputime;statistics(1:35000);cputime-t
ans =  1.6521