OpenDAL does not support streaming data uploads. Users must first load the data into memory and then send it to the writer.

let bs = balabala();
w.write(bs).await?;
let bs = daladala();
w.write(bs).await?;
...
w.close().await?;

There are two main drawbacks to OpenDAL:

• high memory usage, as reported in issue feature request: support stream upload #1821 on GitHub
• low performance due to the need to buffer user data before sending it over the network.

To address this issue, it would be beneficial for OpenDAL to provide an API that allows users to pass a stream or reader directly into the writer.