fix/improve benchmarks

lib.go

@@ -59,6 +59,10 @@ var (
 // DefultPool initializes a synchronized pool that stores and returns byte slices of allocSize length. It can be
 // used with multiple readers concurrently.
 func DefaultPool(allocSize int) Pool {
+	if allocSize == 0 {
+		allocSize = 1 << 12
+	}
+
 	return newPool(allocSize)
 }
 

lib_test.go

@@ -6,6 +6,7 @@ import (
 	"code.squareroundforest.org/arpio/buffer"
 	"errors"
 	"io"
+	"runtime"
 	"testing"
 )
 
@@ -170,7 +171,113 @@ func (w writerOnly) Write(p []byte) (int, error) {
 	return w.in.Write(p)
 }
 
+func TestBenchmarkThroughput(t *testing.T) {
+	p := buffer.DefaultPool(0)
+	dst := bytes.NewBuffer(nil)
+	wo := writerOnly{dst}
+	src := &gen{max: 1 << 18}
+	r := buffer.BufferedReader(src, buffer.Options{Pool: p})
+	ro := readerOnly{r}
+	dst.Reset()
+	if n, err := io.Copy(wo, ro); n != 1<<18 || err != nil {
+		t.Fatal(n, err)
+	}
+}
+
+func TestBenchmarkCompare(t *testing.T) {
+	dst := bytes.NewBuffer(nil)
+	wo := writerOnly{dst}
+	src := &gen{max: 1 << 18}
+	r := bufio.NewReader(src)
+	ro := readerOnly{r}
+	dst.Reset()
+	if n, err := io.Copy(wo, ro); n != 1<<18 || err != nil {
+		t.Fatal(n, err)
+	}
+}
+
+func TestBenchmarkThroughputSTDLib(t *testing.T) {
+	p := buffer.DefaultPool(0)
+	dst := bytes.NewBuffer(nil)
+	wo := writerOnly{dst}
+	src := bytes.NewBuffer(make([]byte, 1<<18))
+	r := buffer.BufferedReader(src, buffer.Options{Pool: p})
+	ro := readerOnly{r}
+	dst.Reset()
+	if n, err := io.Copy(wo, ro); n != 1<<18 || err != nil {
+		t.Fatal(n, err)
+	}
+}
+
+func TestBenchmarkCompareSTDLib(t *testing.T) {
+	dst := bytes.NewBuffer(nil)
+	wo := writerOnly{dst}
+	src := bytes.NewBuffer(make([]byte, 1<<18))
+	r := bufio.NewReader(src)
+	ro := readerOnly{r}
+	dst.Reset()
+	if n, err := io.Copy(wo, ro); n != 1<<18 || err != nil {
+		t.Fatal(n, err)
+	}
+}
+
 func BenchmarkThroughput(b *testing.B) {
+	p := buffer.DefaultPool(0)
+	dst := bytes.NewBuffer(nil)
+	wo := writerOnly{dst}
+	for i := 0; i < b.N; i++ {
+		src := &gen{max: 1 << 18}
+		r := buffer.BufferedReader(src, buffer.Options{Pool: p})
+		ro := readerOnly{r}
+		dst.Reset()
+		io.Copy(wo, ro)
+	}
+}
+
+func BenchmarkCompare(b *testing.B) {
+	dst := bytes.NewBuffer(nil)
+	wo := writerOnly{dst}
+	for i := 0; i < b.N; i++ {
+		src := &gen{max: 1 << 18}
+		r := bufio.NewReader(src)
+		ro := readerOnly{r}
+		dst.Reset()
+		io.Copy(wo, ro)
+	}
+}
+
+func BenchmarkThroughputP(b *testing.B) {
+	p := buffer.DefaultPool(0)
+	b.SetParallelism(runtime.GOMAXPROCS(-1))
+	b.RunParallel(func(pb *testing.PB) {
+		dst := bytes.NewBuffer(nil)
+		wo := writerOnly{dst}
+		for pb.Next() {
+			src := &gen{max: 1 << 18}
+			r := buffer.BufferedReader(src, buffer.Options{Pool: p})
+			ro := readerOnly{r}
+			dst.Reset()
+			io.Copy(wo, ro)
+		}
+	})
+}
+
+func BenchmarkCompareP(b *testing.B) {
+	b.SetParallelism(runtime.GOMAXPROCS(-1))
+	b.RunParallel(func(pb *testing.PB) {
+		dst := bytes.NewBuffer(nil)
+		wo := writerOnly{dst}
+		for pb.Next() {
+			src := &gen{max: 1 << 18}
+			r := bufio.NewReader(src)
+			ro := readerOnly{r}
+			dst.Reset()
+			io.Copy(wo, ro)
+		}
+	})
+}
+
+func BenchmarkThroughputSTDLib(b *testing.B) {
 	p := buffer.DefaultPool(0)
 	dst := bytes.NewBuffer(nil)
 	wo := writerOnly{dst}
@@ -183,14 +290,14 @@ func BenchmarkThroughput(b *testing.B) {
 	}
 }
 
-func BenchmarkCompare(b *testing.B) {
-	dstBuf := bytes.NewBuffer(nil)
-	dst := writerOnly{dstBuf}
+func BenchmarkCompareSTDLib(b *testing.B) {
+	dst := bytes.NewBuffer(nil)
+	wo := writerOnly{dst}
 	for i := 0; i < b.N; i++ {
-		srcBuf := bytes.NewBuffer(make([]byte, 1<<18))
-		srcReader := bufio.NewReader(srcBuf)
-		src := readerOnly{srcReader}
-		dstBuf.Reset()
-		io.Copy(dst, src)
+		src := bytes.NewBuffer(make([]byte, 1<<18))
+		r := bufio.NewReader(src)
+		ro := readerOnly{r}
+		dst.Reset()
+		io.Copy(wo, ro)
 	}
 }