Performance testing tool.
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It enables you compare performance for two domains, great for testing different environments or seeing how your site does against a competitor.
Pro Test ping speeds from different locations
You can see by what margins your results vary when your website's ping is tested from 2 different locations, you can then compare your results with those of your competitors.
Con Only for testing pings
Does not provide much of a detailed report, of how your website performed. But again, MaxCDN Tools, as the site's slogan says - is more of a Ping testing and comparison service than a full fledged website speed profiler.