21 Scripts and Tips to Decrease Website Server Load
1. Use YSlow for Firebug
YSlow is a Firefox add-on that integrates into the firebug web development tool. YSlow grades website performance and download speeds based on a set of rules set by Yahoo Developer team for optimized web sites. YSlow can show you exactly how many resources and downloading times are required for your site, as well as providing tips on how to improve this.
2. Use Smush.it for your images
Smushit.com is a service that goes beyond the limitations of Photoshop, Fireworks & Co. It uses image format specific non-lossy image optimization tools to squeeze the last bytes out of your images - without changing their look or visual quality. You'll get a report of how many bytes you can save by optimizing your images and all the changed images as a single zip for download.
You can use Smush.it as a Firefox add-on, or you can simply go to their site and use the uploader that is provided. Smush.it is a must have plugin if you are a blogger or frequently use images on your website. Rest assured, no quality is lost when decreasing the size.
Though this isn't always possible to do, it is a good idea to do so if you can. When a browser goes to download CSS, scripts, and images from your site, it usually has a maximum amount of information it can stream at once. By placing the scripts at the bottom of our page, we can allow the essentials to load first and then load the scripts at the end.