[kh99]

I don't know a lot about optimization or flushing output, but I don't think it could be done without restructuring things, since the vb pages are set up to output the entire page at the end of the script (which allows the censoring and gzip options to be done on the entire output). It might be interesting to try separating the headers from the page templates and output them at the beginning. But I think the ability for flush to actually send output also depends on the web server configuration, so you might go to all that trouble and find that it still doesn't do anything.

Also I think browser caching might make it so that the advantage you'd get from doing that would be small if any (after the first page load for a user).