use json-iterator/go instead encoding/json

src/server/router/router.go

@@ -16,8 +16,11 @@ import (
 	"github.com/didi/nightingale/v5/src/server/naming"
 
 	promstat "github.com/didi/nightingale/v5/src/server/stat"
+	jsoniter "github.com/json-iterator/go"
 )
 
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+
 func New(version string, reloadFunc func()) *gin.Engine {
 	gin.SetMode(config.C.RunMode)
 

src/server/router/router_datadog.go

@@ -3,7 +3,6 @@ package router
 import (
 	"compress/gzip"
 	"compress/zlib"
-	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"net/http"

src/server/router/router_openfalcon.go

@@ -2,7 +2,6 @@ package router
 
 import (
 	"compress/gzip"
-	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"strconv"
@@ -140,6 +139,7 @@ func (m *FalconMetric) ToProm() (*prompb.TimeSeries, string, error) {
 }
 
 func falconPush(c *gin.Context) {
+
 	var bs []byte
 	var err error
 	var r *gzip.Reader

src/server/router/router_opentsdb.go

@@ -2,7 +2,6 @@ package router
 
 import (
 	"compress/gzip"
-	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"strconv"