The IM SDK does not proactively fetch user information from the backend when a session is updated or a message is received primarily to optimize performance and reduce unnecessary network traffic.
When a session is updated or a message is received, the SDK typically handles the basic information related to the session or message directly. Fetching all user information at each event could lead to excessive data transfer and increased latency, which might negatively impact the user experience.
For example, if a user sends a message in a chat application, the SDK only needs to know the sender's ID and the message content to display it. There's no immediate need to fetch the sender's full profile picture, bio, or other details unless specifically requested by the application.
To efficiently manage user information, developers can integrate with backend services like Tencent Cloud's Cloud Database or API Gateway to fetch user details on-demand. This approach ensures that only necessary data is retrieved, improving the overall efficiency and responsiveness of the application.
For instance, when a user clicks on a profile picture in a chat, the application can then request detailed user information from the backend, ensuring a smooth and efficient user experience.