I'd be very interested in such a resource as well. At the moment I'm just staring at the output of 'objdump -S', trying to make sense of things and find what's

I'd be very interested in such a resource as well. At the moment I'm just staring at the output of 'objdump -S', trying to make sense of things and find what's different between two versions. For smaller things, Matt Godbolt's compiler explorer is very helpful as well. But I'm still having trouble figuring out what exactly is happening and why some things are required, etc.