[jQuery] should I use .txt or a database to retrieve data from it every second

[jQuery] should I use .txt or a database to retrieve data from it every second


Hi all,
To learn some jquery, I am writing some sort of chatbox. My questions
is: what can I use best to store and retrieve the chat text?? Is it
good to store the chat text in the database, or is it better to save
it into a txt file? Ofcourse only new added chat lines will be taken
and displayed underneeth the old ones.
If you don't have much chatters, a database option is ok, but when you
ahve 1000 chatters (as an excample) trying to get new lines from the
database every second (every second a check for new text is done and
displayed if they are), the database will get slow. Then a txt file
would be better? Or doesn't it realy matter what to choose? A txt file
can get big too.
Does anyone has some experience with this and what is the best
approach: .txt or database?
Kind regards,