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Where these values come from?

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#1

it is written “Each CPU-bound request takes 200 milliseconds, whereas a memory-bound request takes 50 milliseconds to complete.”

Where do these 2 values come from? 200ms fro CPU requests and 50ms for memory?

Course: Grokking Modern System Design Interview for Engineers & Managers - Learn Interactively
Lesson: Put Back-of-the-envelope Numbers in Perspective - Grokking Modern System Design Interview for Engineers & Managers

#2

Hi Jakub2,

We have revamped the “Back-of-the-envelope calculations” throughout the course. Please give it a read for a better understanding of the topic.

Thank you & regards,