Reinstalled Manjaro today on a new SSD because my old SSD failed.
Pamac shows 300MB updates.
After 10 Minutes only 15MB were downloaded with Pamac GUI.
After searching the web for possible bugs, i found the Pamac Mirror list is set to any mirrors by default.
This is stupid, seems that Pamac uses a random mirror on first startup. In my case a super slow mirror.
Please add manual mirror list acknowledgement on first Pamac start to avoid slow or not optimal download speed.