Add golang echo benchmark

[ezioruan]

Go benchmark using echo which was created for same purpose as japronto was.

https://www.techempower.com/benchmarks/#section=data-r13&hw=ph&test=plaintext

from the web framework benchmarks
seems go-echo is the fastest web framework in golang

[heppu]

Just ran the tests on my computer got these results:

Go echo
Requests/sec: 85110.81
Transfer/sec: 10.47MB

Go net/http
Requests/sec: 95874.63
Transfer/sec: 11.79MB

Go fasthttp
Requests/sec: 447240.87
Transfer/sec: 62.70MB

Japronto
Requests/sec: 541733.61
Transfer/sec: 47.53MB

So echo is slowest since it doesn't use fasthttp. It is also slower than to pure stdlib implementation since it only adds layers on top of it. If we would benchmark real life use case like normal web page usage then it would do quite good for web framework. But then if you want fast web framework for golang you might wanna check iris which used fasthttp last time I checked.

[squeaky-pl]

@heppu thanks for doing the number for us.