Which is faster in C++?

[Cymbeline]

This may be a stupid question, but here it is:

Which array declaration will be faster to access?

1.
int Matrix1[5][12];
int Matrix2[5][12];
int Matrix3[5][12];

2.
int Matrix[3][5][12];

Cymbeline

[Paul Victorey]

Well, option #2 is easier to program with, as you will have only a single array.

As to speed, I really couldn't tell you. It may vary depending on compiler even.

Why not create code to read, one at a time, every element of the array(s) using both styles, do this something like 1000 times (it would be too quick to really measure otherwise) and have the program take a beginning and end time and subtract? I don't think it's going to be much different though. I wouldn't know how to get this info except by testing it.

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Paul M. Victorey
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