Interesting observation regarding the differences between the EC2 and i7 results: the platforms at the top of the EC2 benchmarks are generally MongoDB+async io java, while the ones at the top of the i7 results are MySQL+heavily threaded (go, servlet, openresty). I think it's a pretty interesting result because it shows how much your choice of available hardware has on which platform would be best - and it's not a small difference either.
If you're going for an EC2/digital ocean setup with a lot of small instances, then you want to go with something like vert.x or node or whatever - while if you are deploying directly onto bare metal high core/ram servers, you'd be better off with something that is better at handling high thread counts - something like Golang.
If you have 8 cores, you'll get 8 threads and all your requests will be nicely distributed across the cores. This is why Go is up near the top for the i7 benchmarks. On the EC2 ones, there are far fewer cores, so the overhead of distributing them is much more pronounced. As you add more cores, you'd probably see Go pull further ahead of some of the competition. However if you're only ever going to be running Go on small instances as many people do, this advantage is actually a hindrance because of the added overhead. Not that it's necessarily a big issue or anything, it's just interesting to consider.
The point I was making is that your actual hardware and workload can turn this benchmark on its head. You may naively think you are upgrading performance by switching to a different framework/language, yet if you don't understand why each platform is getting the numbers it does you might end up rewriting your app and actually decreasing performance because of your server hardware.
If you're going for an EC2/digital ocean setup with a lot of small instances, then you want to go with something like vert.x or node or whatever - while if you are deploying directly onto bare metal high core/ram servers, you'd be better off with something that is better at handling high thread counts - something like Golang.