![]() This page has 33 external JavaScript scripts. YSlow also tells me that I am making folks make too many HTTP requests: It was LOT bigger before and even sucked up gigabytes of bandwidth a few years back. I've also got 184k of JS, 21k of CSS and 30k of markup. YSlow such a wonderful tool and it will totally ruin your day and make you feel horrible about yourself and your site. ![]() In fact, that's often more of a problem then file size. It's not just about size, though, it's also about the number of requests to get the bits. It's important (and useful!) to send as few bytes of CSS and JS and HTML markup down the wire as possible. What's the old joke, "those who can't, teach." I show folks how to optimize their websites all the time but never got around to optimizing my own. It's funny how one gets lazy with their own website. You may feel free to add a comment at the bottom of this post, something like "Um, DUH!" after reading this. You may also want to use a build process to do this minification up-front if possible.Hello Dear Reader. # WordPressĪ number of WordPress plugins can speed up your site by concatenating, minifying, and compressing your styles. You can check this with the React Developer Tools extension. ![]() If your build system minifies CSS files automatically, ensure that you are deploying the production build of your application. # MagentoĮnable the Minify CSS Files option in your store's Developer settings. There are also templates that provide this functionality. # JoomlaĪ number of Joomla extensions can speed up your site by concatenating, minifying, and compressing your css styles. You can also configure more advanced aggregation options through additional modules to speed up your site by concatenating, minifying, and compressing your CSS styles. # Stack-specific guidance # DrupalĮnable Aggregate CSS files in Administration > Configuration > Development. Learn how to minify your CSS code in Minify CSS. This is usually accomplished with a build tool like Gulp or Webpack. You paste your CSS into the service's UI, and it returns a minified version of the code.įor professional developers, you probably want to set up an automated workflow that minifies your CSS automatically before you deploy your updated code. # Use a CSS minifier to minify your CSS codeįor small sites that you don't update often, you can probably use an online service for manually minifying your files. ![]() So, if you use a minifier, you may see more savings than what Lighthouse reports. ![]() As mentioned earlier, minifiers can perform clever optimizations (such as reducing #000000 to #000) to further reduce your file size. Lighthouse provides an estimate of potential savings based on the comments and whitespace characters that it finds in your CSS. For example, the color value #000000 can be further reduced to #000, which is its shorthand equivalent. Some minifiers employ clever tricks to minimize bytes. Minifiers can further improve byte efficiency by removing whitespace: h1, */įrom the perspective of the browser, these 2 code samples are functionally equivalent, but the second example uses less bytes. For example: /* Header background should match brand colors. CSS files are often larger than they need to be. Minifying CSS files can improve your page load performance. The Opportunities section of your Lighthouse report lists all unminified CSS files, along with the potential savings in kibibytes (KiB) when these files are minified: # How minifying CSS files can improve performance ![]()
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