In order to avoid mixed content (secure and non-secured) on a https page on our site I have amended all image and css links to https.

However, as this will now mean the entire site (including http pages as well as https) accessing some images and all css images through a https link is this likely to result in a noticeable slow down of page loading due to the increased workload on the server?

What does everyone else think about the benefit of adding separate css, footer and header files for the https pages? Would this be a better way to go with regards to page load times?

Look forward to everyone's opinion and thanks in advance!