I'd like to read folders and files structure inside a specified folder path on the P4 depot without syncing it. Is it possible?
Note that running using Dirs and Files to recursively iterate through a directory tree is inefficient if you're planning to populate the entire tree.  
If you need file info for all files under a directory, including its children, it's orders of magnitudes faster to just issue the "files" command to include the entire tree (i.e. path/... as opposed to path/*).  
I suspect this is because the P4 server has no concept of directories, internally.  A file's "directory" in P4 is just the last path-separated token in the file's path.  So, it has to do extra work to slice its file set into a directory-specific list.
How to read depot's folders structure by p4python without syncing?