autoupdate is always getting triggered

[simoncn]

The initial scan cannot be incremental because MinimServer needs a complete scan of the library before it can present its top-level index menu.

Subsequent scans use the MinimServer cache but still require looking at each file in the library to check whether it has changed.

Your log shows that reading each file from the cloud via rclone is taking about 3 to 4 seconds. This is about 17 files per minute or 1000 files per hour. On a local filesystem, a speed of at least 500 files per minute (30 times faster) would be expected.

MinimServer is designed for reading and serving files on the device running MinimServer or on another device on the same local network. I don't think it will be possible to get acceptable performance for using it to read and serve files from a cloud library.