Feature request: Compact or condensed mode?

tree seems natural when we cant to overview some new big file tree. But it produces file per line output (like ls -1 does) which quickly fills terminal.

It would be useful to have "bird view" mode (maybe even by default) where files are printed in multiple in a row fashion (like ls does).

For example, in normal mode it could print files in a rows but dirs one per column, but in -d mode it could print dirs in rows too.

Printing logic could be -- if entity is a leaf print it on the same line as previous leaf (if it was a leaf too), otherwise on a new row.

Thanks,