The most common way to use rsync is probably as such:
rsync -avr user@<source>:<source_dir> <dest_dir>
Resulting in 30-35MB/s depending on file sizes
This can be improved by using a more efficient, less secure encryption algorithm, disabling compression
and telling the SSH client to disable some unneeded features that slow things down.
With the settings below I have achieved 100MB/s (at work between VMs) and over 300MB/s at home between SSD drives.

Sam McLeod

A practical guide to speeding up rsync transfers by switching to a more efficient SSH cipher (aes256-gcm), disabling SSH compression, and turning off unneeded SSH features. These tweaks can push transfer speeds from 30-35MB/s up to 100-300MB/s depending on hardware. Includes ready-to-use commands, an optional --delete flag for sync cleanup, and notes on security trade-offs and fallback cipher options for older systems.

Speeding Up rsync