Gazebo 1.2 performance and file structure

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Hello All,

I've just installed gazebo 1.2. All went well, i like the look of the GUI(don't use it though). After some struggling with the new SDF syntax (the converter did not work for me, but i like the syntax), I started very basic world with just the groundplane and the sun model included.

The simulation runs at 0.97X(at best) realtime using 100% on all four cores (intel i7 quadcore clocked at 4.ghz, 6GB ram, Ubuntu 12.04 32bits, Radeon 6870). On version 1.0.2 it ran in excess of 25X realtime using the same solver settings and a more challenging world. Quite dissapointing, is this a common problem? What might be the reason?

Apart from that, what is up with the new file/model structuring system(`database')? I understand a uniform folder and naming structure is useful for sharing etcetera. However I don't feel the need to have this restriction locally. Does every model(file) have to be called model.sdf and include a manifest.xml? E.g when editing (gedit) two models, i cannot tell them apart by their filename which is fairly annoying. Is there a way to circumvent this?

Thanks