From d7f6ef3a796267b4eb920ace54a775486678a321 Mon Sep 17 00:00:00 2001
From: David Anderson <danderson@tailscale.com>
Date: Mon, 31 May 2021 19:32:42 -0700
Subject: [PATCH] util/dnsname: add a benchmark for ToFQDN.

Signed-off-by: David Anderson <danderson@tailscale.com>
---
 util/dnsname/dnsname_test.go | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/util/dnsname/dnsname_test.go b/util/dnsname/dnsname_test.go
index 4867df2ac..b7f5afc1f 100644
--- a/util/dnsname/dnsname_test.go
+++ b/util/dnsname/dnsname_test.go
@@ -185,3 +185,24 @@ func TestTrimSuffix(t *testing.T) {
 		}
 	}
 }
+
+var sinkFQDN FQDN
+
+func BenchmarkToFQDN(b *testing.B) {
+	tests := []string{
+		"www.tailscale.com.",
+		"www.tailscale.com",
+		".www.tailscale.com",
+		"_ssh._tcp.www.tailscale.com.",
+		"_ssh._tcp.www.tailscale.com",
+	}
+
+	for _, test := range tests {
+		b.Run(test, func(b *testing.B) {
+			b.ReportAllocs()
+			for i := 0; i < b.N; i++ {
+				sinkFQDN, _ = ToFQDN(test)
+			}
+		})
+	}
+}