Dropbox and several other companies are using the google brotli compression algorithm. They say it is faster to compress the data and send it to the server instead of sending the non compressed data. I don’t know whether this is true, but maybe we can test it. Increase the sync speed is something every cloud service should prioritize imho.
Dropbox is using a Rust implementation of brotli instead of the C implementation. Maybe it is faster but in every case it is safer.