Ruby-Prof - fast code profiler for Ruby

ruby-prof is a fast code profiler for Ruby. Its features include:

• Speed - it is a C extension and therefore many times faster than the standard Ruby profiler.
• Modes - Ruby prof can measure a number of different parameters, including call times, memory usage and object allocations.
• Reports - can generate text and cross-referenced html reports
  • Flat Profiles - similar to the reports generated by the standard Ruby profiler
  • Graph profiles - similar to GProf, these show how long a method runs, which methods call it and which methods it calls.
  • Call tree profiles - outputs results in the calltree format suitable for the KCacheGrind profiling tool.
• Threads - supports profiling multiple threads simultaneously
• Recursive calls - supports profiling recursive method calls