Optimize ssh makedirs

dvc/remote/ssh/connection.py

@@ -97,10 +97,13 @@ class SSHConnection:
     def makedirs(self, path):
         self._sftp_connect()
 
-        if self.isdir(path):
+        # Single stat call will say whether this is a dir, a file or a link
+        st_mode = self.st_mode(path)
+
+        if stat.S_ISDIR(st_mode):
             return
 
-        if self.isfile(path) or self.islink(path):
+        if stat.S_ISREG(st_mode) or stat.S_ISLNK(st_mode):
             raise DvcException(
                 "a file with the same name '{}' already exists".format(path)
             )