diff --git a/auth.go b/auth.go
index 9e5d4cf6..43ad36f5 100644
--- a/auth.go
+++ b/auth.go
@@ -70,8 +70,9 @@ func BasicAuth(accounts Accounts) HandlerFunc {
 }
 
 func processAccounts(accounts Accounts) authPairs {
-	assert1(len(accounts) > 0, "Empty list of authorized credentials")
-	pairs := make(authPairs, 0, len(accounts))
+	length := len(accounts)
+	assert1(length > 0, "Empty list of authorized credentials")
+	pairs := make(authPairs, 0, length)
 	for user, password := range accounts {
 		assert1(user != "", "User can not be empty")
 		value := authorizationHeader(user, password)
diff --git a/context.go b/context.go
index fb7f54e9..01cff1ae 100644
--- a/context.go
+++ b/context.go
@@ -34,9 +34,11 @@ const (
 	MIMEPOSTForm          = binding.MIMEPOSTForm
 	MIMEMultipartPOSTForm = binding.MIMEMultipartPOSTForm
 	MIMEYAML              = binding.MIMEYAML
-	BodyBytesKey          = "_gin-gonic/gin/bodybyteskey"
 )
 
+// BodyBytesKey indicates a default body bytes key.
+const BodyBytesKey = "_gin-gonic/gin/bodybyteskey"
+
 const abortIndex int8 = math.MaxInt8 / 2
 
 // Context is the most important part of gin. It allows us to pass variables between middleware,
diff --git a/gin.go b/gin.go
index ab1d0a46..888be36b 100644
--- a/gin.go
+++ b/gin.go
@@ -20,11 +20,12 @@ import (
 const defaultMultipartMemory = 32 << 20 // 32 MB
 
 var (
-	default404Body   = []byte("404 page not found")
-	default405Body   = []byte("405 method not allowed")
-	defaultAppEngine bool
+	default404Body = []byte("404 page not found")
+	default405Body = []byte("405 method not allowed")
 )
 
+var defaultAppEngine bool
+
 // HandlerFunc defines the handler used by gin middleware as return value.
 type HandlerFunc func(*Context)
 
diff --git a/mode.go b/mode.go
index ca3677a9..11f833e9 100644
--- a/mode.go
+++ b/mode.go
@@ -22,6 +22,7 @@ const (
 	// TestMode indicates gin mode is test.
 	TestMode = "test"
 )
+
 const (
 	debugCode = iota
 	releaseCode
diff --git a/path.go b/path.go
index 51346e4a..d42d6b9d 100644
--- a/path.go
+++ b/path.go
@@ -136,10 +136,11 @@ func bufApp(buf *[]byte, s string, w int, c byte) {
 
 		// Otherwise use either the stack buffer, if it is large enough, or
 		// allocate a new buffer on the heap, and copy all previous characters.
-		if l := len(s); l > cap(b) {
-			*buf = make([]byte, len(s))
+		length := len(s)
+		if length > cap(b) {
+			*buf = make([]byte, length)
 		} else {
-			*buf = (*buf)[:l]
+			*buf = (*buf)[:length]
 		}
 		b = *buf
 
diff --git a/recovery.go b/recovery.go
index bc946c03..8cf0932a 100644
--- a/recovery.go
+++ b/recovery.go
@@ -146,6 +146,6 @@ func function(pc uintptr) []byte {
 }
 
 func timeFormat(t time.Time) string {
-	var timeString = t.Format("2006/01/02 - 15:04:05")
+	timeString := t.Format("2006/01/02 - 15:04:05")
 	return timeString
 }