With quite a selection of public cloud infrastructure-as-a-service (IaaS) providers to choose from, enterprises also have to decide whether they want open source or proprietary software behind the clouds their apps run on.

When it comes to proprietary technology, Amazon Web Services is clearly the frontrunner. At least for the foreseeable future, it’s the clear 800-pound gorilla that its competitors are chasing. And some of those competitors have taken an open approach. OpenStack, to be specific. Rackspace is the biggest player in that arena, but another player is Internap, which makes the claim that OpenStack public clouds are outperforming Amazon.

According to Satish Hemachandran, senior vice president and general manager of cloud and hosting at Internap, the company’s OpenStack-based public cloud outperforms like Amazon instances in CPU, memory and latency performance, as well as other variables. The comparison comes from a Cloud Spectator benchmarking report.

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