Stackoverflow – “Last seen” not accurate? On stackoverflow the last seen appears to be inaccurate as shown in the linked images. The user, ( I chose random user), asked a question 11 mins ago but his last seen is 21 mins ago ?? Images: https://imgur.com/a/qP2KUiE |
It wouldn’t surprise me to learn that Stack Overflow’s developers—like those of many large websites—have decided, as a performance optimization, to allow some information to be cached, and updated lazily, to avoid the cost of providing a globally-consistent, up-to-the-minute view to every user.