Once upon a time, there was a person named Gordon. He liked to make websites.
One sunny day, Gordon bound a callback to a scroll event without throttling it. The goddess of frontend performance descended from the skies and said to Gordon, "Gordon, do you know what you did?", to which Gordon replied, "Yes, I'm sorry. I'll never do it again"
From then on, not a day went by where Gordon didn't think about his encounter with the goddess of frontend performance. Needless to say, he lived happily ever after.