Golang fasthttp very slow response : I have very slow http response perfomance

Used Go and Fasthttp

```golang
package main

import (
	"fmt"
	"github.com/valyala/fasthttp"
)

func fastHTTPHandler(ctx *fasthttp.RequestCtx) {
	var s string = ""
	for i := 1; i <= 100000; i++ {
		s += "hello "
	}
	ctx.SetBodyString(s)
}

func main() {
	fmt.Print("Started")
	fasthttp.ListenAndServe(":8081", fastHTTPHandler)
}
```

And test it in Insomnia (Postman). Time of execution 3-4 sec. Similar code on PHP executed in 900ms.

[PHP img][1]

[Golang img][2]


  [1]: https://i.stack.imgur.com/iQrGN.jpg
  [2]: https://i.stack.imgur.com/zRtqe.jpg