MethodProfiler observes your code and generates reports about the methods that were run and how long they took.

A iterations per second enhancement to Benchmark.

Statistically correct benchmarking for Ruby.

Simple benchmarking with noticable progress and pretty results.

Sharable benchmarks

A panel that appears in the browser to provide stats on page load times and other debugging information for Rails 3 & 4

Library for generating nice ruby-benchmarks

Benchmarkable allows monitoring the performance of instance methods and reporting those in csv format