add timing info to benchmark command

cmd/benchmark.go

@@ -3,6 +3,8 @@ package cmd
 import (
 	"gitlab.com/privategrity/server/benchmark"
 	"github.com/spf13/cobra"
+	"time"
+	"fmt"
 )
 
 var benchBatchSize uint64
@@ -25,7 +27,17 @@ var benchmarkCmd = &cobra.Command{
   Short: "Server benchmarking tests",
   Long:  `Run internal benchmark funcs by specifying node and batch sizes`,
   Run: func(cmd *cobra.Command, args []string) {
+		fmt.Printf("Running benchmarks for %d nodes with %d batch size and %d" +
+			" iterations...\n", nodeCount, benchBatchSize, iterations)
+
+		start := time.Now()
 		benchmark.PrecompIterations(nodeCount, benchBatchSize, iterations)
+		precompDelta := (float64(time.Since(start))/1000000000)/float64(iterations)
+		fmt.Printf("Precomp took an average of %f s\n", precompDelta)
+
+		start = time.Now()
 		benchmark.RealtimeIterations(nodeCount, benchBatchSize, iterations)
+		realtimeDelta := (float64(time.Since(start))/1000000000)/float64(iterations)
+		fmt.Printf("Realtime took an average of %f s\n", realtimeDelta)
   },
 }