From 8cc3f246b74f06d46eff82a1915d2585a70b7beb Mon Sep 17 00:00:00 2001
From: Eric Chlebek <eric@sensu.io>
Date: Wed, 22 Nov 2017 18:15:05 -0800
Subject: [PATCH] Look up struct fields by name.

Reduces cost of querying in the most common case.

Refs #586
---
 types/dynamic/dynamic.go | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/types/dynamic/dynamic.go b/types/dynamic/dynamic.go
index 9d8070dbc1..03b994a384 100644
--- a/types/dynamic/dynamic.go
+++ b/types/dynamic/dynamic.go
@@ -34,10 +34,9 @@ func GetField(v Attributer, name string) (interface{}, error) {
 		if kind := strukt.Kind(); kind != reflect.Struct {
 			return nil, fmt.Errorf("invalid type (want struct): %v", kind)
 		}
-		fields := getFields(strukt)
-		field, ok := fields[name]
-		if ok {
-			return field.Value.Interface(), nil
+		field := strukt.FieldByName(name)
+		if field.IsValid() {
+			return field.Interface(), nil
 		}
 	}
 	// If we get here, we are dealing with extended attributes.