bullet is a gem to help you increase your application’s performance by reducing the number of sql requests it makes. bullet 2.3.0 got 10% performance improved for activerecord 3.0.12, it works much faster, bullet for ar 3.1.4 is 48% faster than for ar 3.0.12, and for ar 3.2.2 is 40% faster than for ar 3.0.12, check out the changelog here.