diff --git a/fs/localfs/localfs_benchmark_test.go b/fs/localfs/localfs_benchmark_test.go
new file mode 100644
index 000000000..a38e0f28f
--- /dev/null
+++ b/fs/localfs/localfs_benchmark_test.go
@@ -0,0 +1,61 @@
+package localfs_test
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/google/uuid"
+
+	"github.com/kopia/kopia/fs/localfs"
+)
+
+func BenchmarkReadDir0(b *testing.B) {
+	benchmarkReadDirWithCount(b, 0)
+}
+
+func BenchmarkReadDir1(b *testing.B) {
+	benchmarkReadDirWithCount(b, 1)
+}
+
+func BenchmarkReadDir2(b *testing.B) {
+	benchmarkReadDirWithCount(b, 2)
+}
+
+func BenchmarkReadDir10(b *testing.B) {
+	benchmarkReadDirWithCount(b, 10)
+}
+
+func BenchmarkReadDir100(b *testing.B) {
+	benchmarkReadDirWithCount(b, 100)
+}
+
+func BenchmarkReadDir1000(b *testing.B) {
+	benchmarkReadDirWithCount(b, 1000)
+}
+
+func BenchmarkReadDir10000(b *testing.B) {
+	benchmarkReadDirWithCount(b, 10000)
+}
+
+func benchmarkReadDirWithCount(b *testing.B, fileCount int) {
+	b.Helper()
+
+	b.StopTimer()
+
+	td := b.TempDir()
+
+	for i := 0; i < fileCount; i++ {
+		os.WriteFile(filepath.Join(td, uuid.NewString()), []byte{1, 2, 3, 4}, 0o644)
+	}
+
+	b.StartTimer()
+
+	ctx := context.Background()
+
+	for i := 0; i < b.N; i++ {
+		dir, _ := localfs.Directory(td)
+		dir.Readdir(ctx)
+	}
+}