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memory copying #98

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reklis opened this issue Jan 19, 2015 · 1 comment
Open

memory copying #98

reklis opened this issue Jan 19, 2015 · 1 comment

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@reklis
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reklis commented Jan 19, 2015

Describe the difference between physical memory and virtual memory, and how data is read and written to the RAM chips
@dmag
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dmag commented Mar 21, 2015

Reference for physical memory: What every programmer should know about memory by Ulrich Drepper.

My favorite is Figure 6.1 on page 2. Accessing a 2-D array in the 'wrong' order is 30x-40x slower than the 'right' order. RAM has "seek time" just like a hard drive.

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@dmag @reklis