High CPU performance on a cloud hosting platform

There isn't enough detail here. The issues to think about with cloud based hosting are:

1. privacy/ownership issues - is it OK that someone else has legal ownership of your data? The implication being that currently (just like the phone company or any other service provider) should there be a subpoena issued for that data you have no right to be notified or quash the motion

2. no performance SLA- While there are SLAs available for availability, I don't know of any cloud providers that provide performance SLAs

3. Cost - very generally TCO (from cheapest to most expensive) is self owned-self hosted, colocated, VPS, cloud based. There are exceptions to every rule but for an entoer infrastructure, I've yet to see a cost effective cloud

The cloud has 1 real draw, and that's the pay for what you use model coupled with 0 expense deployment/provisioning. For labs, servers that get created and destroyed quickly and often, you can't beat the cloud.