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This article mainly explains "how C++ accesses memory in a predictable way". The content in the article is simple, clear and easy to learn and understand. let's study and learn "how C++ accesses memory in a predictable way".

Per.19: access memory in a predictable way

Reason (reason)

Performance is very sensitive to cache performance and cache algorithms favor simple (usually linear) access to adjacent data.

The performance of the program is directly related to the performance of the buffer, while the buffering algorithm is better at dealing with simple (usually linear) access to continuous data.

Example (sample)

Int matrix [rows] [cols]

/ / bad

For (int c = 0; c < cols; + + c)

For (int r = 0; r < rows; + + r)

Sum + = matrix [r] [c]

/ / good

For (int r = 0; r < rows; + + r)

For (int c = 0; c < cols; + + c)

Sum + = matrix [r] [c]; Thank you for reading, this is the content of "how C++ accesses memory in a predictable way". After the study of this article, I believe you have a deeper understanding of how C++ accesses memory in a predictable way, and the specific usage still needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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