Actually, it's not so simple. codesighs, as I might have predicted, doesn't appear to work that well, so I regressed back to nm. And when I actually poked the generated DXR database for mozilla-central using dehydra (I haven't had the guts to try my dxr-clang integration on m-c yet), I discovered that it appears to only lack the information about functions. Both static functions and member C++ functions—my suspicions of breakage are now confirmed. So I resorted to one of my "one-liner" scripts, as follows:
It's really 4 commands, which just happens to include two HEREDOC cats and a multi-line python script. The output is a
little HTML file that loads a treemap visualization using the google API. The end result can be seen here. To answer the question posed yesterday: SVG accounts for about 5-6% of libxul, in terms of content, and about another 1% for the layout component; altogether, about as much as our xpconnect code accounts for libxul. For Thunderbird folks, I've taken the time to also similarly divvy up libxul, and that can be found here.
P.S., if you're complaining about the lack of hard numbers, blame Google for giving me a crappy API that doesn't allow me to make custom tooltips.