I'm looking at site performance suggestions from Google's Page Speed tool and want to know how to deal with the following problems shown in my speed tool reports.
I have lots of resources that fall under this Suggestion:
The following resources are missing a cache expiration. Resources that do not specify an expiration may not be cached by browsers. Specify an expiration at least one month in the future for resources that should be cached, and an expiration in the past for resources that should not be cached:
How do you set this?
NEXT:
The following image(s) are missing width and/or height attributes.
How do these get dealt with?
How can these values be changed to improve performance?