I'm using Fedora 33 and noticed high cpu usage on rslsync also. It turns out I am syncing my entire home folder including the log file, creating a never-ending loop, as mentioned in this post. Writing this in case it might help someone else googling this. Thanks for sharing!
[Solved] High CPU Usage, Sync.log filled in seconds
in Sync Troubleshooting
Posted
I'm using Fedora 33 and noticed high cpu usage on rslsync also. It turns out I am syncing my entire home folder including the log file, creating a never-ending loop, as mentioned in this post. Writing this in case it might help someone else googling this. Thanks for sharing!