Optimising for speed is important to the success of your site. Research shows that if visitors to your site wait longer than they think is reasonable, they will give up and go elsewhere. The magic figure seems to be around 3-5 seconds, before you have to make an impression, so if you keep those visits coming in, then you need to be optimising for speed.
There are a number of great resources online. As we do a mixture of both WordPress and Joomla sites, we’ll start with the ones that you will find most useful for any site. Any of the sites we build for our clients are pre-optimised using the resources below and may optionally include other add-on optimisations such as content delivery networks.