How to effectively combine two directories in Emacs?

Question

I tried using plain ediff-directories to diff between files, but it is very slow because I need to compare files at each nesting level and there are too many of them.

I also tried ediff-trees (defined in ediff-trees.el ), but this is not convenient either because I don’t even see how many files are different and the image is not visible at all.

Is there any other way to do this?

Answer 1

The https://github.com/fourier/ztree package works great for this. Even working on TRAMP.