gob: move benchmarks to a new timing_test.go file.
Add malloc counts for encode and decode.
R=rsc
CC=golang-dev
https://golang.org/cl/4290048
diff --git a/src/pkg/gob/timing_test.go b/src/pkg/gob/timing_test.go
new file mode 100644
index 0000000..5f71f3f
--- /dev/null
+++ b/src/pkg/gob/timing_test.go
@@ -0,0 +1,116 @@
+// 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"
+ "flag"
+ "fmt"
+ "io"
+ "os"
+ "runtime"
+ "runtime/pprof"
+ "testing"
+)
+
+type Bench struct {
+ A int
+ B float64
+ C string
+ D []byte
+}
+
+var memprofile = flag.String("memprofile", "", "write the memory profile in Test*Mallocs to the named file")
+
+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.String())
+ }
+ benchmarkEndToEnd(r, w, b)
+}
+
+func BenchmarkEndToEndByteBuffer(b *testing.B) {
+ var buf bytes.Buffer
+ benchmarkEndToEnd(&buf, &buf, b)
+}
+
+func TestCountEncodeMallocs(t *testing.T) {
+ runtime.MemProfileRate = 1
+ var buf bytes.Buffer
+ enc := NewEncoder(&buf)
+ bench := &Bench{7, 3.2, "now is the time", []byte("for all good men")}
+ 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)
+ }
+ }
+ mallocs += runtime.MemStats.Mallocs
+ if *memprofile != "" {
+ if fd, err := os.Open(*memprofile, os.O_WRONLY|os.O_CREAT|os.O_TRUNC, 0666); err != nil {
+ t.Errorf("can't open %s: %s", *memprofile, err)
+ } else {
+ if err = pprof.WriteHeapProfile(fd); err != nil {
+ t.Errorf("can't write %s: %s", *memprofile, err)
+ }
+ fd.Close()
+ }
+ }
+ fmt.Printf("mallocs per encode of type Bench: %d\n", mallocs/count)
+}
+
+func TestCountDecodeMallocs(t *testing.T) {
+ runtime.MemProfileRate = 1
+ 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)
+ mallocs := 0 - runtime.MemStats.Mallocs
+ for i := 0; i < count; i++ {
+ *bench = Bench{}
+ err := dec.Decode(&bench)
+ if err != nil {
+ t.Fatal("decode:", err)
+ }
+ }
+ mallocs += runtime.MemStats.Mallocs
+ if *memprofile != "" {
+ if fd, err := os.Open(*memprofile, os.O_WRONLY|os.O_CREAT|os.O_TRUNC, 0666); err != nil {
+ t.Errorf("can't open %s: %s", *memprofile, err)
+ } else {
+ if err = pprof.WriteHeapProfile(fd); err != nil {
+ t.Errorf("can't write %s: %s", *memprofile, err)
+ }
+ fd.Close()
+ }
+ }
+ fmt.Printf("mallocs per decode of type Bench: %d\n", mallocs/count)
+}
