November 2007 - Posts  Making best use of cache for high
performance website  Use URLs consistently  Browsers cache
content based on the URL. When URL changes, browser fetches a
new version from origin server. URL can be changed by changing
the query string parameters. For example, “/default.aspx” is
cached on the browser. If you request “/default.aspx?123” it
will fetch new content from server. Response from the new URL
can also be cached in browser if you return proper caching
headers. In that case, changing the query parameter to something
else like “/default.aspx?456” will return new content from
server. So, you need to make sure you use URL consistently
everywhere when you want to get cached response. From homepage,
if you have requested a file with URL “/welcome.gif”, make sure
from another page you request the same file using the same URL.
One common mistake is to sometimes omit the “www” subdomain from
the url. is not same as Both will be cached separately.  Cache
static content for longer period  Sta