Chris wrote:

>> Except you cannot rely on sessions. If they don't have cookies
>> enabled in their browser then every request will appear to be from a
>> new session.
>>
>
> Unless you use URL rewriting to carry the session ID. See "Passing the
> Session ID", about 1/2 the way down this page:

That's true.

However in my case, it was far more efficient to generate the images before
they would be requested as there can be up to 6 generated images on a page,
and the speed increase was over 500% than creating each one as they were
requested.

Also, the caching aspect of it (ie writing the file out to the filesystem
for a set period of time) was also useful for my solution as the same image
may be requested multiple times by the user within three to four pageviews,
and this may or may not have been cached by the browser.

Overall page generation time has sped up considerably and the server load
has decreased dramatically. We generate roughly 50 thousand of these images
a day so every time/load saving is important.

--
Chris Hope - The Electric Toolbox - http://www.electrictoolbox.com/