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I'm experimenting with MATLAB OOP , as a start I mimicked my C++'s Logger classes and I'm putting all my string helper functions in a String class, thinking it would be great to be able to do things like a + b , a == b , a.find( b ) instead of strcat( a b ) , strcmp( a, b ) , retrieve first element of strfind( a, b ) , etc. The problem: slowdown I put the above things to use and immediately noticed a drastic slowdown. Am I doing it wrong (which is certainly possible as I have rather limited MATLAB experience), or does MATLAB's OOP just introduce a lot of overhead? My test case Here's the simple test I did for string, basically just appending a string and removing the appended part again: Note: Don't actually write a String class like this in real code! Matlab has a native string array type now, and you should use that instead. classdef String < handle .... properties stringobj = ''; end function o = plus( o, b ) o.stringobj = [ o.stringobj b ]; end function n = Length( o ) n = length( o.stringobj ); end function o = SetLength( o, n ) o.stringobj = o.stringobj( 1 : n ); end end function atest( a, b ) %plain functions n = length( a ); a = [ a b ]; a = a( 1 : n ); function btest( a, b ) %OOP n = a.Length(); a = a + b; a.SetLength( n ); function RunProfilerLoop( nLoop, fun, varargin ) profile on; for i = 1 : nLoop fun( varargin{ : } ); end profile off; profile report; a = 'test'; aString = String( 'test' ); RunProfilerLoop( 1000, @(x,y)atest(x,y), a, 'appendme' ); RunProfilerLoop( 1000, @(x,y)btest(x,y), aString, 'appendme' ); <str

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