diff --git a/src/fs/Walk_fast.go b/src/fs/Walk_fast.go
index e686f55..f85f811 100644
--- a/src/fs/Walk_fast.go
+++ b/src/fs/Walk_fast.go
@@ -17,7 +17,7 @@ func Walk(directory string, callBack func(string)) error {
 	}
 
 	defer syscall.Close(fd)
-	buffer := make([]byte, 1024)
+	buffer := make([]byte, 512)
 
 	for {
 		n, err := syscall.ReadDirent(fd, buffer)
diff --git a/src/fs/bench_test.go b/src/fs/bench_test.go
index a8202db..6cc12ab 100644
--- a/src/fs/bench_test.go
+++ b/src/fs/bench_test.go
@@ -30,7 +30,7 @@ func BenchmarkReaddirnames(b *testing.B) {
 			func(string) {}(file)
 		}
 
-		f.Close()
+		assert.Nil(b, f.Close())
 	}
 }