Why does instatiating more instances of a MATLAB class take a shorter time in MATLAB 7.9 (R2009b)?

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MathWorks Support Team
I am using a class in MATLAB that I wrote. I find that if I create 10 objects of that class at once, then create 20 objects of that class, the first set of operations actually takes longer. TIC and TOC verify the observed behavior.

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MathWorks Support Team
The reason for this somewhat odd result can be attributed due to the slow nature of the loading of a MATLAB class the first time. The first time MATLAB loads a new class, it has to do extra processing compared to successive loads. On successive loads, all the class information is already cached, so it is much faster. If you put a "clear classes" statement between the two operations, you will find that the second operation will take longer than the first, due to the fact that the second operation also has to load the class from scratch.

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