Output elapsed analysis time in debug mode

# Feature request

Debug mode is great for debugging memory issue, but I'm missing some info about time elapsed for each file. Sth like:

```
/src/File1.php
--- consumed 6 MB, total 286 MB, took 0.1 s
/src/File2.php
--- consumed 4 MB, total 290 MB, took 3.2 s

```