10 Ways to Improve Your Site Speed

What you can do about it:

4. Consolidate page resources. Consolidating similar page resources into bundles is an effective way to battle latency; fewer bundles equals fewer server roundtrips.

5. Add an Expires header. Adding Expires headers lets you control how long your page resources are stored in the visitor's browser cache. Therefore, a visitor can return to your site days, weeks, even months later and still experience faster load times. Expires headers are most often used with images, but they can be used on all resources, from scripts to Flash components.