how long is a piece of string? It depends on the time that your database query or http call takes, and how much data you are returning, and how much processing

how long is a piece of string? It depends on the time that your database query or http call takes, and how much data you are returning, and how much processing you have to do on it. A well written query or call won't have too much of a negative impact, maybe making the page two times slower than a static. A poorly written query strategy could make a page a thousand times slower. xdebug and timing code are helpful.