You are developing a large Web application. Controllers are full of complex data retrieving logic, views contain tons of blocks, partials, loops. One day you will receive an email with user complaints about some of your pages slowness. There are many profiling tools, some of them are easy (ruby-prof), others are large and complex (newrelic), but regardless of this it’s really hard to find the particular place where you have a real bottleneck. So we created really simple, but über-useful tool for ruby code profiling.