System design, one design at a time
Read a design in short sections, then keep it
Every design here is split into sections of a few minutes each. Each section opens with a one-line takeaway and the numbers to remember, and ends with a Remember box and questions to check yourself. Progress is saved in your browser.
Designs
Four views of every design
Map m
The whole design on one screen: the parts, the approaches, the one number, and every section.
Read r
One section at a time in a quiet column, with the takeaway on top and the questions below.
Cheat sheet c
Everything worth keeping, on one page.
Cards f
Every self-check question as a flashcard. Mark it got or again.