Earlier quoted context omitted.
Those are not lines of code. That includes docstrings which all of Pocoo code is full of. If you want to measure lines of code you at least have to skip comments, docstrings and empty lines. And for that there is sloccount. This also includes the testsuites btw. With this little script ( http://paste.pocoo.org/show/465885/ ) I get the following results: Flask 1467 LOC Jinja2 6560 LOC Werkzeug 9923 LOC Bottle 1910 LOC…
There are better ways to count LOC, I agree. But the idea is the same: Bottle does what it does with 1/10 of the code that runs flask.
It would be much more interesting for potential users if people started comparing lines of documentation(LOD) and showed the quotient lines of tests/lines of code.