initial bench and generate command structure

cmd/bolt/bench.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"os"
+
+	"github.com/boltdb/bolt"
+)
+
+// Run benchmarks on a given dataset.
+func Bench() {
+	path := "bench"
+	if _, err := os.Stat(path); os.IsNotExist(err) {
+		fatal(err)
+		return
+	}
+
+	db, err := bolt.Open(path, 0600)
+	if err != nil {
+		fatal(err)
+		return
+	}
+	defer db.Close()
+
+	bucketName := "widgets"
+	key := "key1"
+	value := "value1"
+
+	err = db.Update(func(tx *bolt.Tx) error {
+		// Find bucket.
+		b := tx.Bucket(bucketName)
+		if b == nil {
+			fatalf("bucket not found: %s", bucketName)
+			return nil
+		}
+
+		// Set value for a given key.
+		return b.Put([]byte(key), []byte(value))
+	})
+	if err != nil {
+		fatal(err)
+		return
+	}
+}

cmd/bolt/generate.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+// Generate data for benchmarks.
+func Generate(numEvents int, destPath string) {
+	f, err := os.Create(destPath)
+	if err != nil {
+		fatal(err)
+	}
+	defer func() {
+		if err := f.Close(); err != nil {
+			fatal(err)
+		}
+	}()
+	w := bufio.NewWriter(f)
+
+	for i := 0; i < numEvents; i++ {
+		if _, err := w.Write([]byte(fmt.Sprintf("key%d:%s\n", i, strings.Repeat("0", 64)))); err != nil {
+			fatal(err)
+		}
+	}
+
+	if err = w.Flush(); err != nil {
+		fatal(err)
+	}
+}

cmd/bolt/generate_test.go

@@ -0,0 +1 @@
+package main

cmd/bolt/main.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"strconv"
 
 	"github.com/codegangsta/cli"
 )
@@ -90,6 +91,25 @@ func NewApp() *cli.App {
 				Check(path)
 			},
 		},
+		{
+			Name:  "generate",
+			Usage: "Generate data for benchmarks",
+			Action: func(c *cli.Context) {
+				numEvents, err := strconv.Atoi(c.Args().Get(0))
+				if err != nil {
+					fatal(err)
+				}
+				destPath := c.Args().Get(1)
+				Generate(numEvents, destPath)
+			},
+		},
+		{
+			Name:  "bench",
+			Usage: "Run benchmarks on a given dataset",
+			Action: func(c *cli.Context) {
+				Bench()
+			},
+		},
 	}
 	return app
 }