Add zipfile performance testing

cmd/mothd/zipfs_test.go

@@ -5,10 +5,80 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
+	"math/rand"
 	"os"
 	"testing"
+	"time"
 )
 
+func TestZipPerformance(t *testing.T) {
+	// I get 4.8s for 10,000 reads
+	if os.Getenv("BENCHMARK") == "" {
+		return
+	}
+	
+	rng := rand.New(rand.NewSource(rand.Int63()))
+	
+	tf, err := ioutil.TempFile("", "zipfs")
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	defer os.Remove(tf.Name())
+
+	w := zip.NewWriter(tf)
+	for i := 0; i < 100; i += 1 {
+		fsize := 1000
+		switch {
+		case i % 10 == 0:
+			fsize = 400000
+		case i % 20 == 6:
+			fsize  = 5000000
+		case i == 80:
+			fsize = 1000000000
+		}
+		
+		f, err := w.Create(fmt.Sprintf("%d.bin", i))
+		if err != nil {
+			t.Fatal(err)
+			return
+		}
+		if _, err := io.CopyN(f, rng, int64(fsize)); err != nil {
+			t.Error(err)
+		}
+	}
+	w.Close()
+	
+	tfsize, err := tf.Seek(0, 2)
+	if err != nil {
+		t.Fatal(err)
+	}
+	
+	startTime := time.Now()
+	nReads := 10000
+	for i := 0; i < 10000; i += 1 {
+		r, err := zip.NewReader(tf, tfsize)
+		if err != nil {
+			t.Error(err)
+			return
+		}
+		filenum := rng.Intn(len(r.File))
+		f, err := r.File[filenum].Open()
+		if err != nil {
+			t.Error(err)
+			continue
+		}
+		buf, err := ioutil.ReadAll(f)
+		if err != nil {
+			t.Error(err)
+		}
+		t.Log("Read file of size", len(buf))
+		f.Close()
+	}
+	t.Log(nReads, "reads took", time.Since(startTime))
+	t.Error("moo")
+}
+
 func TestZipfs(t *testing.T) {
 	tf, err := ioutil.TempFile("", "zipfs")
 	if err != nil {