More Optimization Measures
Another important step in improving the performance of my recent redesign involves the optimization of both CSS and JavaScript content. During development there were around 15 server requests for these two types of files, 10 JavaScript files and 5 CSS files. This was okay for my own use, but would not work for production purposes.
Optimizing these file types involves consolidation, compression, and caching. Consolidation of 10 JavaScript files into three is huge improvement. Now I deliver one JS file for the functionality of the site, one for Mint, and another for Analytics. Likewise for the stylesheets; after consolidation, a single stylesheet is delivered to all modern browsers. There are two additional stylesheets as well, but they are targeted at IE6 and mobile browsers and will not load elsewhere.
Once the files were consolidated as much as possible, it was time to optimize or “crunch” them. Using the sexy Flumpcakes CSS optimizer, I was able to reduce my stylesheets by around 25%. Likewise for JavaScript, I used xtreeme.com’s optimizer to shave an additional 20% off the size of my JS content.
Finally, once I had consolidated and compressed my JS and CSS files as much as possible, I wanted to further my optimization efforts by ensuring that these files were cached by the browser. By setting far-future Expires headers for everything but the statistical files, my site gains an additional performance boost by eliminating the need to reload preexisting content.
