Six short, click-through lessons on why software is fast — or isn't.
How work grows as the input gets bigger.
start →One query becomes dozens, hidden in a loop.
start →Loading only what's visible, right when it's needed.
start →Serving content from near the user, not across the world.
start →Remembering an answer instead of recomputing it.
start →Taming events that fire too often.
start →