diff --git a/cmd/benchcmp/benchcmp.go b/cmd/benchcmp/benchcmp.go
index c2f0013e..56ef55ad 100644
--- a/cmd/benchcmp/benchcmp.go
+++ b/cmd/benchcmp/benchcmp.go
@@ -16,6 +16,7 @@ import (
 var (
 	changedOnly = flag.Bool("changed", false, "show only benchmarks that have changed")
 	magSort     = flag.Bool("mag", false, "sort benchmarks by magnitude of change")
+	best        = flag.Bool("best", false, "compare best times from old and new")
 )
 
 const usageFooter = `
diff --git a/cmd/benchcmp/parse.go b/cmd/benchcmp/parse.go
index 30102f88..f1df681c 100644
--- a/cmd/benchcmp/parse.go
+++ b/cmd/benchcmp/parse.go
@@ -114,8 +114,16 @@ func ParseBenchSet(r io.Reader) (BenchSet, error) {
 	for scan.Scan() {
 		if b, err := ParseLine(scan.Text()); err == nil {
 			b.ord = ord
-			bb[b.Name] = append(bb[b.Name], b)
 			ord++
+			old := bb[b.Name]
+			if *best && old != nil {
+				if old[0].NsOp < b.NsOp {
+					continue
+				}
+				b.ord = old[0].ord
+				bb[b.Name] = old[:0]
+			}
+			bb[b.Name] = append(bb[b.Name], b)
 		}
 	}
 
diff --git a/cmd/benchcmp/parse_test.go b/cmd/benchcmp/parse_test.go
index 3f3c0036..a59b20c5 100644
--- a/cmd/benchcmp/parse_test.go
+++ b/cmd/benchcmp/parse_test.go
@@ -152,3 +152,43 @@ func TestParseBenchSet(t *testing.T) {
 		t.Errorf("parsed bench set incorrectly, want %v have %v", want, have)
 	}
 }
+
+func TestParseBenchSetBest(t *testing.T) {
+	// Test that -best mode takes best ns/op.
+	*best = true
+	defer func() {
+		*best = false
+	}()
+
+	in := `
+		Benchmark1 10 100 ns/op
+		Benchmark2 10 60 ns/op
+		Benchmark2 10 500 ns/op
+		Benchmark1 10 50 ns/op
+	`
+
+	want := BenchSet{
+		"Benchmark1": []*Bench{
+			{
+				Name: "Benchmark1",
+				N:    10, NsOp: 50, Measured: NsOp,
+				ord: 0,
+			},
+		},
+		"Benchmark2": []*Bench{
+			{
+				Name: "Benchmark2",
+				N:    10, NsOp: 60, Measured: NsOp,
+				ord: 1,
+			},
+		},
+	}
+
+	have, err := ParseBenchSet(strings.NewReader(in))
+	if err != nil {
+		t.Fatalf("unexpected err during ParseBenchSet: %v", err)
+	}
+	if !reflect.DeepEqual(want, have) {
+		t.Errorf("parsed bench set incorrectly, want %v have %v", want, have)
+	}
+}