FAQs: Feed FAQs

In January 2019, Japanese billionaire Yusaku Maezawa posted a tweet offering one million yen to 100 random people who retweeted it. Within 24 hours, the post had been retweeted over 3.8 million times, making it at the time the most retweeted post in the platform's history. Every one of Maezawa's followers needed that post delivered

We’ve all been there. Our incredibly witty, insightful post being shared worldwide by millions, or our painstakingly created meme being fought over by competing celebrity accounts. What, wait, you haven't found online celebrity success? OK, so you might not have caused the “fail whale” on X back in the day, but we’ve all seen it

Activity feeds power some of the most heavily used features on the web: X's home timeline, Facebook's news feed, LinkedIn's updates, and the notifications panel in nearly every social app. They look simple on the surface, but feeds that work fine with 10,000 users often collapse under the weight of 10 million. The core challenge