computer speed statistics

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Here are some useful numbers for relative data retrieval speeds:


Data that lives here... ...will take this long to access
CPU Register < 1 nanosecond
CPU cache 2 nanoseconds
RAM 50 nanoseconds
Disk 12,000,000 nanoseconds
Somewhere in that pile of paper on your desk 42,000,000,000 nanoseconds

(Note that a nanosecond is 1 billionth of a second.)

This was taken from a blog by mozy:
http://mozy.com/blog/2006/06/13/defrag-the-mozy-way

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