sftpfs: reuse connections

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

internal/vfs/gcsfs.go

@@ -534,6 +534,9 @@ func (fs *GCSFs) ScanRootDirContents() (int, int64, error) {
 			}
 			numFiles++
 			size += attrs.Size
+			if numFiles%1000 == 0 {
+				fsLog(fs, logger.LevelDebug, "root dir scan in progress, files: %d, size: %d", numFiles, size)
+			}
 		}
 
 		objects = nil