https://play.golang.org/p/k8N1_YAYB__s

package main

import (
"log"
"github.com/json-iterator/go"
)

type TestStruct struct {
Tfloat jsoniter.Any
}

var (
jsonToTest = []byte("{"Tfloat":1.122e+250}")
)

func main() {
n := TestStruct{}
err := jsoniter.Unmarshal(jsonToTest, &n)

if err != nil {
	panic(err)
}

log.Println("Original:", n)

}

with large number the jsoniter.Any is broken
error message is like:
panic: main.TestStruct.Tfloat: strconv.ParseFloat: parsing "1.122e+250": value out of range

using interface{} is OK
json.RawMessage is not OK