Patched it to 1.0.1.
My tests show about x1.5 overall performance boost.
Also changed physics setting to be more straight - it's 30/60/120 physics frames per second. Less frames - less CPU demand and more stable, but less smooth result.
You can tune it to match your hardware.
Some drops during mining deep holes in large asteroids are expected. To address it I need to rewrite whole destruction system, so this will take more time. Beyound that, game is playable (played in 30 FPS on i3-6200U in energy saving mode till end)
Thank you, hope you will enjoy Shards of Minor Planets!