What is faster ASP.NET MVC or Ruby On Rails [closed]
If you compare just raw execution .NET is faster than PHP or RoR. However, the speed and overall performance of an application depends on its architecture. For example: StackOverflow runs on less than 10 servers. I work for a company that runs a website with pretty much the same hardware (+- 10 heavy work servers) but SO is way faster and has hundred times more access that my company's website.
So in most case it is really about how you implement the software other than the platform itself.
You can not compare the language only based on speed. Each language has its own features. So you need to choose as per your requirement.
For example. If you want less spendings on hosting and other stuff then go for PHP else if you want pure MVc then gofor ruby on rails or asp.net mvc.