From 3ad42fb8ca6398ae17882a2b53cf3b65ba9fe1e7 Mon Sep 17 00:00:00 2001
From: wojtekt <wojtekt@google.com>
Date: Thu, 3 Oct 2019 16:38:47 +0200
Subject: [PATCH] Cache encoder for auditlog backend

---
 .../apiserver/plugin/pkg/audit/log/backend.go      | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/staging/src/k8s.io/apiserver/plugin/pkg/audit/log/backend.go b/staging/src/k8s.io/apiserver/plugin/pkg/audit/log/backend.go
index e1c948f62ae..2ef2cc6ece9 100644
--- a/staging/src/k8s.io/apiserver/plugin/pkg/audit/log/backend.go
+++ b/staging/src/k8s.io/apiserver/plugin/pkg/audit/log/backend.go
@@ -44,18 +44,18 @@ var AllowedFormats = []string{
 }
 
 type backend struct {
-	out          io.Writer
-	format       string
-	groupVersion schema.GroupVersion
+	out     io.Writer
+	format  string
+	encoder runtime.Encoder
 }
 
 var _ audit.Backend = &backend{}
 
 func NewBackend(out io.Writer, format string, groupVersion schema.GroupVersion) audit.Backend {
 	return &backend{
-		out:          out,
-		format:       format,
-		groupVersion: groupVersion,
+		out:     out,
+		format:  format,
+		encoder: audit.Codecs.LegacyCodec(groupVersion),
 	}
 }
 
@@ -73,7 +73,7 @@ func (b *backend) logEvent(ev *auditinternal.Event) bool {
 	case FormatLegacy:
 		line = audit.EventString(ev) + "\n"
 	case FormatJson:
-		bs, err := runtime.Encode(audit.Codecs.LegacyCodec(b.groupVersion), ev)
+		bs, err := runtime.Encode(b.encoder, ev)
 		if err != nil {
 			audit.HandlePluginError(PluginName, err, ev)
 			return false