It seems to me CPU in All plans are fairly weak. While at the lower end this is acceptable. Anything above 4GB just seems unbalanced. If you do a quick check on ServerBear, it is especially true for the 32 - 96GB plan.
I'd recommend spinning up a larger sized virtual server and playing with it to get a sense of real world performance.
Benchmarks do a very high load that isn't always indicative of how a real world application will work but if you are having any performance issues on of your virtual servers regardless of the size please open a ticket and we'll troubleshoot it.
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