@@ -6,18 +6,21 @@ import (

 )

 const (

-	// Define our own version of RFC339Nano because we want one

+	// RFC3339NanoFixed is our own version of RFC339Nano because we want one

 	// that pads the nano seconds part with zeros to ensure

 	// the timestamps are aligned in the logs.

 	RFC3339NanoFixed = "2006-01-02T15:04:05.000000000Z07:00"

-	JSONFormat       = `"` + time.RFC3339Nano + `"`

+	// JSONFormat is the format used by FastMarshalJSON

+	JSONFormat = `"` + time.RFC3339Nano + `"`

 )

+// FastMarshalJSON avoids one of the extra allocations that

+// time.MarshalJSON is making.

 func FastMarshalJSON(t time.Time) (string, error) {

 	if y := t.Year(); y < 0 || y >= 10000 {

 		// RFC 3339 is clear that years are 4 digits exactly.

 		// See golang.org/issue/4556#c15 for more discussion.

-		return "", errors.New("Time.MarshalJSON: year outside of range [0,9999]")

+		return "", errors.New("time.MarshalJSON: year outside of range [0,9999]")

 	}

 	return t.Format(JSONFormat), nil

 }