diff --git a/bootstrap/conf.go b/bootstrap/conf.go
index 246d3114..1a171474 100644
--- a/bootstrap/conf.go
+++ b/bootstrap/conf.go
@@ -1,7 +1,6 @@
 package bootstrap
 
 import (
-	"encoding/json"
 	"github.com/Xhofe/alist/conf"
 	"github.com/Xhofe/alist/utils"
 	log "github.com/sirupsen/logrus"
@@ -28,7 +27,7 @@ func InitConf() {
 		log.Fatalf("reading config file error:%s", err.Error())
 	}
 	conf.Conf = new(conf.Config)
-	err = json.Unmarshal(config, conf.Conf)
+	err = utils.Json.Unmarshal(config, conf.Conf)
 	if err != nil {
 		log.Fatalf("load config error: %s", err.Error())
 	}
diff --git a/build.sh b/build.sh
index 5ff616e9..381aa3fd 100644
--- a/build.sh
+++ b/build.sh
@@ -26,7 +26,7 @@ if [ "$1" == "docker" ]; then
 -X 'github.com/Xhofe/alist/conf.GitCommit=$gitCommit' \
 -X 'github.com/Xhofe/alist/conf.GitTag=$gitTag' \
 "
-  go build -o ./bin/alist -ldflags="$ldflags" alist.go
+  go build -o ./bin/alist -ldflags="$ldflags" -tags=jsoniter alist.go
   exit 0
 fi
 
@@ -68,9 +68,9 @@ ldflags="\
 "
 
 if [ "$1" == "release" ]; then
-  xgo -out alist -ldflags="$ldflags" .
+  xgo -out alist -ldflags="$ldflags" -tags=jsoniter .
 else
-  xgo -targets=linux/amd64,windows/amd64 -out alist -ldflags="$ldflags" .
+  xgo -targets=linux/amd64,windows/amd64 -out alist -ldflags="$ldflags" -tags=jsoniter .
 fi
 mkdir "build"
 mv alist-* build
diff --git a/drivers/189/189.go b/drivers/189/189.go
index c14e9ae5..1e4c98b4 100644
--- a/drivers/189/189.go
+++ b/drivers/189/189.go
@@ -10,7 +10,6 @@ import (
 	"crypto/x509"
 	"encoding/base64"
 	"encoding/hex"
-	"encoding/json"
 	"encoding/pem"
 	"errors"
 	"fmt"
@@ -158,7 +157,7 @@ func (driver Cloud189) Login(account *model.Account) error {
 	if err != nil {
 		return err
 	}
-	err = json.Unmarshal(res.Body(), &loginResp)
+	err = utils.Json.Unmarshal(res.Body(), &loginResp)
 	if err != nil {
 		log.Error(err.Error())
 		return err
diff --git a/drivers/189/driver.go b/drivers/189/driver.go
index eea3cdac..75ca8e59 100644
--- a/drivers/189/driver.go
+++ b/drivers/189/driver.go
@@ -5,7 +5,6 @@ import (
 	"crypto/md5"
 	"encoding/base64"
 	"encoding/hex"
-	"encoding/json"
 	"fmt"
 	"github.com/Xhofe/alist/conf"
 	"github.com/Xhofe/alist/drivers/base"
@@ -233,7 +232,6 @@ func (driver Cloud189) Move(src string, dst string, account *model.Account) erro
 	if err != nil {
 		return err
 	}
-
 	dstDirFile, err := driver.File(dstDir, account)
 	if err != nil {
 		return err
@@ -249,7 +247,7 @@ func (driver Cloud189) Move(src string, dst string, account *model.Account) erro
 			"isFolder": isFolder,
 		},
 	}
-	taskInfosBytes, err := json.Marshal(taskInfos)
+	taskInfosBytes, err := utils.Json.Marshal(taskInfos)
 	if err != nil {
 		return err
 	}
@@ -305,7 +303,7 @@ func (driver Cloud189) Copy(src string, dst string, account *model.Account) erro
 			"isFolder": isFolder,
 		},
 	}
-	taskInfosBytes, err := json.Marshal(taskInfos)
+	taskInfosBytes, err := utils.Json.Marshal(taskInfos)
 	if err != nil {
 		return err
 	}
@@ -335,7 +333,7 @@ func (driver Cloud189) Delete(path string, account *model.Account) error {
 			"isFolder": isFolder,
 		},
 	}
-	taskInfosBytes, err := json.Marshal(taskInfos)
+	taskInfosBytes, err := utils.Json.Marshal(taskInfos)
 	if err != nil {
 		return err
 	}
@@ -424,9 +422,6 @@ func (driver Cloud189) Upload(file *model.FileStream, account *model.Account) er
 		"sliceMd5":     utils.GetMD5Encode(strings.Join(md5s, "\n")),
 		"lazyCheck":    "1",
 	}, account)
-	if err == nil {
-		_ = base.DeleteCache(file.ParentPath, account)
-	}
 	return err
 }
 
diff --git a/drivers/shandian/driver.go b/drivers/shandian/driver.go
index d44b8f3c..5fb0aed9 100644
--- a/drivers/shandian/driver.go
+++ b/drivers/shandian/driver.go
@@ -235,7 +235,11 @@ func (driver Shandian) Upload(file *model.FileStream, account *model.Account) er
 		"id":   parentId,
 		"name": file.GetFileName(),
 	}
-	_, err = driver.Post("https://shandianpan.com/api/pan/upload", data, &resp, account)
+	res, err := driver.Post("https://shandianpan.com/api/pan/upload", data, nil, account)
+	if err != nil {
+		return err
+	}
+	err = utils.Json.Unmarshal(res, &resp)
 	if err != nil {
 		return err
 	}
diff --git a/utils/json.go b/utils/json.go
new file mode 100644
index 00000000..159da605
--- /dev/null
+++ b/utils/json.go
@@ -0,0 +1,5 @@
+package utils
+
+import jsoniter "github.com/json-iterator/go"
+
+var Json = jsoniter.ConfigCompatibleWithStandardLibrary