From 0b37bd9b3f7556d31061c6007afca59ffe2642d3 Mon Sep 17 00:00:00 2001
From: Josh Bleecher Snyder <josharian@gmail.com>
Date: Mon, 1 Nov 2021 14:07:30 -0700
Subject: [PATCH] net: add BenchmarkWriteToReadFromUDPAddrPort

The main item of interest is the allocs.

BenchmarkWriteToReadFromUDPAddrPort-8   	  237735	      5152 ns/op	      68 B/op	       3 allocs/op

Change-Id: I5cb3f2e1ebbb02acc51039c2266e99b90d388a99
Reviewed-on: https://go-review.googlesource.com/c/go/+/360598
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
---
 src/net/udpsock_test.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/net/udpsock_test.go b/src/net/udpsock_test.go
index 74e449c8881..371d9af5116 100644
--- a/src/net/udpsock_test.go
+++ b/src/net/udpsock_test.go
@@ -479,6 +479,7 @@ func BenchmarkReadWriteMsgUDPAddrPort(b *testing.B) {
 	if err != nil {
 		b.Fatal(err)
 	}
+	defer conn.Close()
 	addr := conn.LocalAddr().(*UDPAddr).AddrPort()
 	buf := make([]byte, 8)
 	b.ResetTimer()
@@ -500,6 +501,7 @@ func BenchmarkWriteToReadFromUDP(b *testing.B) {
 	if err != nil {
 		b.Fatal(err)
 	}
+	defer conn.Close()
 	addr := conn.LocalAddr()
 	buf := make([]byte, 8)
 	b.ResetTimer()
@@ -515,3 +517,25 @@ func BenchmarkWriteToReadFromUDP(b *testing.B) {
 		}
 	}
 }
+
+func BenchmarkWriteToReadFromUDPAddrPort(b *testing.B) {
+	conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer conn.Close()
+	addr := conn.LocalAddr().(*UDPAddr).AddrPort()
+	buf := make([]byte, 8)
+	b.ResetTimer()
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		_, err := conn.WriteToUDPAddrPort(buf, addr)
+		if err != nil {
+			b.Fatal(err)
+		}
+		_, _, err = conn.ReadFromUDP(buf) // TODO: create and use ReadFromUDPAddrPort
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+}