Peek into how much each line of your Rails application takes throughout a request.

Rack middleware for rblineprof (github.com/tmm1/rblineprof)

pilfer uses rblineprof to measure how long each line of code takes to execute and the number of times it was called.

Easy-to-use line profiler for Ruby.

A wrapper to profiling a whole method body

command line rbline prof for rails apps

A console-based browser for rblineprof results

Better web app profiler for Rails apps