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1. Re: Speed Test - Web Developers Toolbar
David_Powers Dec 2, 2010 4:25 AM (in response to broomeGirl)OhDer wrote:
Obviously I would have to change the date to some future date but I would like to know how far in the future I should make it and whether I have to make a note in my calendar to change it when it gets close to the expiry date and then re-upload it and how important is it?You question highlights the problem with using that technique. Many images will never change, so you can set the expiry date several years in advance. However, if you change an image, browsers and proxies that have already visited the site won't display the updated version. The way to get round that problem is to add an incremental number at the end of an updated image, but then you need to update the HTML markup, as well.
Maybe others can comment on the usefulness of this technique. As far as I'm aware browsers check whether a file has changed since it was last accessed, so the amount of delay caused by not setting an expiry date is likely to be minimal.



