Forum Moderators: phranque
Too many redirects, regardless of how they're implemented, can cause performance problems. The impact would depend on how many redirects you have, the CPU/memory/disk performance of your server, and the number of HTTP requests you receive per unit time. The only way to tell is to test.
A quick search over the forums here [google.com] will turn up plenty of reading on the topic, compose. That's where I located the quotation ;)