Improving performance of generic map clone (#326)

pkg/config/generic_map.go

@@ -21,7 +21,7 @@ type GenericMap map[string]interface{}
 
 // Copy will create a flat copy of GenericMap
 func (m GenericMap) Copy() GenericMap {
-	result := GenericMap{}
+	result := make(GenericMap, len(m))
 
 	for k, v := range m {
 		result[k] = v

pkg/config/generic_map_test.go

@@ -0,0 +1,17 @@
+package config
+
+import (
+	"fmt"
+	"testing"
+)
+
+func BenchmarkGenericMap_Copy(b *testing.B) {
+	m := GenericMap{}
+	for i := 0; i < 20; i++ {
+		m[fmt.Sprintf("key-%d", i)] = fmt.Sprintf("value-%d", i)
+	}
+
+	for i := 0; i < b.N; i++ {
+		_ = m.Copy()
+	}
+}