From help-request at octave dot org Mon Feb 27 05:30:59 2006 Subject: Performance of fread From: Sascha Berkenkamp To: help at octave dot org Date: Mon, 27 Feb 2006 12:22:00 +0100 Hi, I would like to know some things about the speed of the fread function. In my scenary I'll get about 1000 pictures of one CCD camera. I have to know the data from one pixel about the 1000 pictures. So in my first step I sort the pictures new. So at the result I'll get all informations about the pixel in one file (in my case the pixels-informations of one column of the CCD array in one file). The second step is to open all the files and read the pixels in order to do some FFT and filtering. I have to read about 800 files (each as about 578 information of the pixels). In the end I do about 400.000 ffts. But I think that the fread (and the speed of the disk) function is the least link. Is there any chance to make the fread faster, or is it better to do all the task in C? Sascha ------------------------------------------------------------- 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 Subscription information: http://www.octave.org/archive.html -------------------------------------------------------------