主动刷新和需要重新加载之间的实时馈送差异

Question

On Facebook, the refreshing on the News Feed occurs in real-time. On other sites like LinkedIn or Twitter, it requires the user to click something like "Show 3 new updates".

I was wondering if there is actually a major difference in the two approaches from the back-end perspective, or is this mainly a UI consideration?

If it is a difference in back-end, what are the differences?

Answer 1

Probably just UI considerations, if Twitter can get the number of updates, it can probably get also the content of these updates.