Advanced bandwidth profiling

So, I was wondering if anyone knows a way to, post-compilation, get a list of all the bitmaps, their compression type, compression quality, pre size and post size.

I’m always finding myself fudging with if I can sacrifice quality for compression, and by how much, and what type … and to do that for every single bitmap in a whole site tends to get rather tedious … so It would be nice with some advanced statistics.

Anyone got any pointers here?