monkdiscuss kimmel While working on the redesign I became familiar with the existing CSS on PM. When an anonymous user loads the main page two CSS files are downloaded. <a href="/css/common.css">common.css</a> and [id://204962]. Using different tools and verifying against a <a href="https://github.com/kimmel/perlmonks-redesign/blob/master/reports/css_spider_log.txt">list of 105 PM pages</a> I was able to determine what CSS was <a href="https://github.com/kimmel/perlmonks-redesign/blob/master/reports/unused_css_selectors.txt">not being used</a>. This CSS can be removed which mean less data needs to be sent to the end users. HTML comments were another thing I found that can be stripped out. Here is the before and after of the main page: <pre> Current version: $ wc pm_divs.html 1545 6537 73719 pm_divs.html After stripping comments: $ wc pm_divs.html 1515 5942 70317 pm_divs.html </pre> A savings of 3,402 bytes for the main page and similar savings for all other pages on the site as well. Talk about some major bandwidth savings. I also found empty paragraph tags that I stripped out as well. Furthermore I noticed that the content being delivered does not include ‘Content-Encoding gzip’ or any other indication of compressions. As numerous studies have shown <a href="http://www.ibm.com/developerworks/web/library/wa-httpcomp/">compression is a good thing</a>. So why is there no compression before transmission of a web page? Edit: Linked to the CSS files.