This course has been updated! We now recommend you take the JavaScript Performance course.

Check out a free preview of the full Website Performance course:
The "Exercise 1" Lesson is part of the full, Website Performance course featured in this preview video. Here's what you'd learn in this lesson:

In this exercise, test three websites with the YSlow plugin. Select the site with the lowest grade and examine some of the ways the performance could be improved based on the YSlow reports.

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