Re: [octave] file i/o performance

[Søren Hauberg]

Keith Goodman wrote:
> On 5/25/05, Søren Hauberg <address@hidden> wrote:
>
> > > > I had parts of strcmp implemented in C++, so I just finished it. For the
> > > > tests I have performed this is about 40 times faster than the version
> > > > shipped with Octave. Use it if you like...
>
>
> It's 100 times faster for what I typically do. How do we get it into Octave?
I'm surprised - I thought 40 was a pretty big number. But I guess it 
depends on your usage. I'll send it of to address@hidden now, and then 
we'll see if jwe will maintain it (C++ is more work to maintain than .m 
files)

/Søren


> > > x = cellfun("char(rand(1,8)*(1*'z' - 1*'a') + 1*'a')",cell(1000,1));
> > > tic;strcmp(x,x{13,:});toc
>
> ans = 0.010574
>
> > > tic;strcmp(x,x{13,:});toc
>
> ans = 0.0026650
>
> > > tic;strcmp(x,x{13,:});toc
>
> ans = 0.0023830
>
> > > tic;strcmp(x,x{13,:});toc
>
> ans = 0.0026950
>
> > > cd ..
> > > clear strcmp
> > > tic;strcmp(x,x{13,:});toc
>
> ans = 0.33405
>
> > > tic;strcmp(x,x{13,:});toc
>
> ans = 0.32350
>
> > > tic;strcmp(x,x{13,:});toc
>
> ans = 0.32281
>
> > > tic;strcmp(x,x{13,:});toc
>
> ans = 0.32319
>
> > > 0.322/0.0025
>
> ans = 128.80
>
>
>
>
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Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
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