Eliz_Cosmos

[Elon Musk @elonmusk]

Long day at Twitter HQ with eng team

Two significant problems mostly addressed:

1. Fanout service for Following feed was getting overloaded when I tweeted, resulting in up to 95% of my tweets not getting delivered at all. Following is now pulling from search (aka Earlybird). When Fanout crashed, it would also destroy anyone else’s tweets in queue.

2. Recommendation algorithm was using absolute block count, rather than percentile block count, causing accounts with many followers to be dumped, even if blocks were only 0.1% of followers. Also, it’s trivial to bot spam accounts with blocks.