I've heard good things about New Relic for performance testing.
MiniTest, which is built into ruby 1.9 has a full suite including performance tests. It's really cool because you can measure e.g. whether an algorithm scales linearly or not.
MiniTest, which is built into ruby 1.9 has a full suite including performance tests. It's really cool because you can measure e.g. whether an algorithm scales linearly or not.
Tip for OP: As you might already have been read on the internets, worry about scaling later, because there's a very high chance that your app will need special care and will differ from other people cases.