how is using an array of 1024x1024 more efficient than an array or 1000x1000?

each pixel is stored in  8, 16, 32 or 64 bits depending on what data type you use.  For each pixel your storing rgb data and in some cases alpha, brightness and luminosity values for each pixel. . all of these can be stored in a different data type.  So in the end the width and height value of an image is really irrelevant.  When it does become relevant is when you perform an algorithm on the image, like resizing it.  I'm sure you could write an algorithm that would resize images better that weren't to the power of two.

to the computer 1024 is just a number.. the same as 3 or 7.

Handle every stressful situation like a dog.

If you can't eat it or play with it,

just pee on it and walk away. :-)

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I wouldnt have to manage my anger

if people would manage their stupidity......