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Full Version: Using CI for AJAX (how about performance?)
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Just asking - i wanna implement some ajax on my front-end, so i wonder - is it wise to use CI's controller for answers?
Or it is a way better to write separate php that do only this stuff.

For instance - take a list of cities from a database when a user selected a particular country. 
It's way more convenient to implement it all in CI (because i can reuse models, and helpers and query builder is quite nice.)
But does it worth it? Will CI itself be a huge impedance  for frequent AJAX requests?
"Will CI itself be a huge impedance for frequent AJAX requests?"

No

"It's way more convenient to implement it all in CI (because i can reuse models, and helpers and query builder is quite nice.)"

That's why you use a framework