this was from one of my previous posts
the only difference is that it forces to internally buffer the output instead of outputting the buffer, you will see no difference in speed or server overhead with a simple header redirect, or setting a cookie, and i have yet to see any difference when doing anything with that option regardless of what it is, glad i could help
however that was til a site i had grew to number and number of posts/request that sort of thing
it is a company intranet of 1000 peeps involving calendars/chats/message boards all that sort of thing and i relied on ob_start() until it grew enormously and they were using it
they called and asked why it was so slow, since its right on their network
i said hmmmmm......let me think
so i removed all ob_start()'s, then removed all output before header calls and voila it works like lightning
now keep in mind that this is hundreds of requests per minute and if you don't get into something that large you shouldn't have
a problem with ob_start()
