Question

I’ve created a small jquery and php chatroom with some .get and .post functions and php docs that read and write data to a sql server. It works fine, but the small problem is when someone posts something, it takes about half a second for it to appear (because of the lag).
I fear there’s something wrong with my coding.
im using

setinterval (listen, 300)

as my continuous jquery function for reading new db entries, listen is a function with a .get inside. How does stackoverflow or facebook do it so that the user types something in and immediately it pops out?

Answer 1

Maybe try displaying the inputted chat message immediately to the user who posted it, prior to posting it to the database.

Like this:

• User enters message, submits
• Update users chat window so they see it immediately
• POST message to database
• GET from db and update all chat windows