This recent thread in this forum which provides a script to do some testing on PHP and database calls may shed some light on server performance. Not the same as real world experience and needs to be tested on a non-production instance of Moodle really to be safe. I used the script to test out £80 a year hosting solution. You can see the script results here.
We have had no speed issues with 11 concurrent users using the moodle at once sometimes all doing the same test at the same time when I am using it for dedicated face to face courses. It has to be daid though we mostly get a few log ins a day in general use so it suits us for that purpose.
Hardware and performance
Terrible Performance / Flooding Server???
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