Performance Tuning

Handy guide looking at the results of the Yahoo yslow FireFox plugin and how to handle some of the performance issues using Ruby on Rails or web server (nginx) configuration tricks.

Blog on Rails performance tuning, from the author of the railsbench gem.

Includes interviews with a variety of folks from the Rails community.

From the creators of the New Relic Rails Performance Management system.

A collection of screencasts and interviews about Rails application performance. Put together by New Relic, but focused on the general issues, not on their monitoring solution.

Httperf is a tool for measuring web server performance. It provides a flexible facility for generating various HTTP workloads and for measuring server performance. The focus of httperf is not on implementing one particular benchmark but on providing a robust, high-performance tool that facilitates the construction of both micro- and macro-level benchmarks.

Plugin that bundles multiple CSS and JavaScript files into a single pair of files to improve page rendering times.

Simple gem/script that helps analyze Rails log files for hotspots.

A stand-alone performance diagnostic tool from Rubysophic, which plans to introduce a hosted service to complement the software.

Set of scripts for doing benchmarking and performance analysis of Rails apps.

ruby-prof is a fast code profiler for Ruby.

Mole is a gem that instruments your application and stores usage and performance information in the database.

Listing of stress and load testing tools that are useful with Ruby on Rails (and other) web applications.

Gem for analyzing Rails production logs to find the slow parts of your code.

Doesn’t appear to have been updated in a while, but still lots of logging/analysis tools to check out.

Good overview of what EXPLAIN is, how its results are calculated, and what all of the data is presents means.

Presentation slides, recording, and quick reference for Httperf talk at www2007 conference.

Talk from RailsConf Europe 2007 on scaling Rails applications, based on the Twitter experience.

Guide to using memcached, an in-memory object caching system.

Ruby on Rails plug-in and hosted service for performance analysis. Can be used in development and in production. “Lite” service is free; more features available on paid plans.

Ruby on Rails application monitoring tool. Installs as a gem on your server. Supports plug-ins for extending its monitoring functions. Limited free plan with 30-minute monitoring interval for a single server, plus a variety of paid plans for multiple servers, more plug-ins, and more frequent monitoring.

Hosted service for monitoring the performance of your Ruby on Rails application, as well as all the software components of your hosting infrastructure.

A new socially networked application profiling tool for Ruby on Rails applications. You can view the performance details for your application, and if you want help, you can upload your performance data to the FiveRuns site, where colleagues or the Rails community at large can offer help.