Cloud Speed Study: Microsoft Windows Azure Fastest Cloud

Matthew Weinberger

October 10, 2011

2 Min Read
Cloud Speed Study: Microsoft Windows Azure Fastest Cloud


The cloud uptime and reliability tracking specialists at Cloudsleuth have released the results of a 12-month study of the speed and performance of 25 major cloud providers — and Microsoft Windows Azure stands at the top of the list, beating out competitors including Google App Engine, Amazon EC2, GoGrid and Terremark by margins varying from “slight” to “tremendous.”

You can see Cloudsleuth’s own breakdown of the study’s highlights here, and the full report is available as a zipped Excel file here. Cloudsleuth’s usual modus operandi is to provide reliability and speed reports for major cloud service providers over the last 30 days free of charge.

It’s intended as  a tool to help organizations make sure they’re partnering with a vendor that can meet their needs. But this is the first time CloudSleuth has released 12 months of data, covering August 2010 to July 2011, in a unified report with useful charts and graphs.

Here’s a top five list, as per the report, with time represented in miliseconds:


Windows Azure (US Central – Illinois)

Google App Engine

Opsource (US East – Virginia)

GoGrid (US East – Virginia)

BlueLock (US Central – Indiana)

12 Month Average







According to Ars Technica, CloudSleuth’s method for determining these speeds is as follows:

Compuware uses 30 testing nodes spread around the globe to gauge performance of the cloud services once every 15 minutes. The company performed 515,000 tests overall for a year’s worth of data covering August 2010 to July 2011, which Compuware released today. Each test requires the loading of a simulated retail shopping site consisting of two pages, one page containing 40 item descriptions and small JPEG images, and the second page containing a single, larger image of 1.75MB.

No, the test isn’t foolproof — not every organization is going to be doing things over HTTP, as the test requires. And as Ars Technica points out, many of these providers have proven their overall stability, reliability and performance with customers even if they don’t chart. But it’s still a very useful comparison of data that we don’t usually get to see.

In that blog entry, Cloudsleuth asks three important questions:

  • What observations do you gather from this information?

  • What questions do we have for our included providers?

  • What suggestions do you have for representing this data more accurately?

If you have answers or insight, you can e-mail them directly at [email protected]. And of course, we welcome your perspectives in the comments below.

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