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cmp: a pedestrian yet very fast file comparator

version 1.0.0.0 (3.1 KB) by us
CMP compares two files byte by byte

2.6K Downloads

Updated 11 Apr 2007

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CMP compares two files byte by byte employing a speed and memory optimized engine.
if the files do not match, CMP prints/returns the position and the numerical and ASCII character representation of the first differing byte and its ten neighbors.

performance:

% create a file with 80 megabytes of random data
fnam='cmp_test.mat';
tmat=rand(1,10*2^20);
save(fnam,'tmat');
clear tmat;
tic;
r=cmp(fnam,fnam,'-b','-s');
toc
delete(fnam);

% wintel systems:
% 1) p5/1.6ghz/512mb/win2k/r2007a
% > elapsed time = 3.7021 seconds
% 2) p5/2.6ghz/512mb/winxp/r2007a
% > elapsed time = 2.1013 seconds
% 3) c2.2*2.4ghz/2gb/winvista/r2007a
% > elapsed time = 1.0190 seconds

see
> help cmp
and the screen shot for more information about this self-explanatory snippet and its few options.

Cite As

us (2021). cmp: a pedestrian yet very fast file comparator (https://www.mathworks.com/matlabcentral/fileexchange/14596-cmp-a-pedestrian-yet-very-fast-file-comparator), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R14
Compatible with any release
Platform Compatibility
Windows macOS Linux

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