encoding: move asn1, csv, gob, json, xml into encoding

This is Go 1 package renaming CL #1.
This one merely moves the source; the import strings will be
changed after the next weekly release.

The only edits are in Makefiles.

R=r, rsc
CC=golang-dev
https://golang.org/cl/5331060

src/pkg/encoding/gob/timing_test.go

@@ -0,0 +1,94 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gob
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"runtime"
+	"testing"
+)
+
+type Bench struct {
+	A int
+	B float64
+	C string
+	D []byte
+}
+
+func benchmarkEndToEnd(r io.Reader, w io.Writer, b *testing.B) {
+	b.StopTimer()
+	enc := NewEncoder(w)
+	dec := NewDecoder(r)
+	bench := &Bench{7, 3.2, "now is the time", []byte("for all good men")}
+	b.StartTimer()
+	for i := 0; i < b.N; i++ {
+		if enc.Encode(bench) != nil {
+			panic("encode error")
+		}
+		if dec.Decode(bench) != nil {
+			panic("decode error")
+		}
+	}
+}
+
+func BenchmarkEndToEndPipe(b *testing.B) {
+	r, w, err := os.Pipe()
+	if err != nil {
+		panic("can't get pipe:" + err.Error())
+	}
+	benchmarkEndToEnd(r, w, b)
+}
+
+func BenchmarkEndToEndByteBuffer(b *testing.B) {
+	var buf bytes.Buffer
+	benchmarkEndToEnd(&buf, &buf, b)
+}
+
+func TestCountEncodeMallocs(t *testing.T) {
+	var buf bytes.Buffer
+	enc := NewEncoder(&buf)
+	bench := &Bench{7, 3.2, "now is the time", []byte("for all good men")}
+	runtime.UpdateMemStats()
+	mallocs := 0 - runtime.MemStats.Mallocs
+	const count = 1000
+	for i := 0; i < count; i++ {
+		err := enc.Encode(bench)
+		if err != nil {
+			t.Fatal("encode:", err)
+		}
+	}
+	runtime.UpdateMemStats()
+	mallocs += runtime.MemStats.Mallocs
+	fmt.Printf("mallocs per encode of type Bench: %d\n", mallocs/count)
+}
+
+func TestCountDecodeMallocs(t *testing.T) {
+	var buf bytes.Buffer
+	enc := NewEncoder(&buf)
+	bench := &Bench{7, 3.2, "now is the time", []byte("for all good men")}
+	const count = 1000
+	for i := 0; i < count; i++ {
+		err := enc.Encode(bench)
+		if err != nil {
+			t.Fatal("encode:", err)
+		}
+	}
+	dec := NewDecoder(&buf)
+	runtime.UpdateMemStats()
+	mallocs := 0 - runtime.MemStats.Mallocs
+	for i := 0; i < count; i++ {
+		*bench = Bench{}
+		err := dec.Decode(&bench)
+		if err != nil {
+			t.Fatal("decode:", err)
+		}
+	}
+	runtime.UpdateMemStats()
+	mallocs += runtime.MemStats.Mallocs
+	fmt.Printf("mallocs per decode of type Bench: %d\n", mallocs/count)
+}