I've recently been analyzing HTML pages rendered by Community Server to help optimize page downloading, rendering, and caching. To help in this task, I created a quick web-based Page Weight Calculator.
The calculator analyzes the source of an HTML page and determines how many occurences and how much space is used by script, styles, comments, tags, certain properties, excess white space, etc.
The information provided by the Page Weight Calculator is useful when determining what types of changes would most affect the rendered page size.