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Speedshop
Ruby on Rails performance consulting, scaling, and optimization.
- Authority
- 48 reach 7 · trust 5 · quality 21 · freshness 15
- Tier
- listed
- llms.txt
- https://www.speedshop.co/llms.txt
- Sections
- 2
- Links
- 30
- Size
- 7617 bytes
- Popularity rank
- #481266
- For agents
- Documentation: developer or product docs worth reading, nothing to call
- First seen
- 2026-10-19T10:43:34.556Z
- Last checked
- 2026-10-21T04:27:24.141Z
- Badge
Their llms.txt
The beginning of the file, from our validated copy saved 2026-10-21T04:27:19.455Z. Cached copy · Source on speedshop.co
# Speedshop
> Ruby on Rails performance consulting, scaling, and optimization.
Request a page with `Accept: text/markdown` to receive Markdown instead of HTML. Explicit Markdown URLs also work without a special header: append `.md` to a page URL, use `/retainer.md`, or use `/blog/post/index.md`.
## Pages
- [Homepage](https://www.speedshop.co/)
- [Performance retainer](https://www.speedshop.co/retainer.html)
- [Rails Performance Slack](https://www.speedshop.co/slack.html)
## Blog posts
- [Organization for Transformative Works Performance Audit](https://www.speedshop.co/blog/performance-lessons-from-ao3/): A Rails performance audit report for the Organization for Transformative Works and Archive of Our Own.
- [Announcing the Rails Performance Apocrypha](https://www.speedshop.co/blog/announcing-apocrypha/): I've written a new book, compiled from 4 years of my email newsletter.
- [We Made Puma Faster With Sleep Sort](https://www.speedshop.co/blog/we-made-puma-faster-with-sleep-sort/): Puma 5 is a huge major release for the project. It brings several new experimental performance features, along with tons of bugfixes and features. Let's talk...
- [The Practical Effects of the GVL on Scaling in Ruby](https://www.speedshop.co/blog/the-ruby-gvl-and-scaling/): MRI Ruby's Global VM Lock: frequently mislabeled, misunderstood and maligned. Does the GVL mean that Ruby has no concurrency story or CaN'T sCaLe? To underst...
- [The World Follows Power Laws: Why Premature Optimization is Bad](https://www.speedshop.co/blog/why-premature-optimization-is-bad/): Programmers vaguely realize that 'premature optimization is bad'. But what is premature optimization? I'll argue that any optimization that does not come fro...
- [Why Your Rails App is Slow: Lessons Learned from 3000+ Hours of Teaching](https://www.speedshop.co/blog/what-i-learned-teaching-rails-performance/): I've taught over 200 people at live workshops, worked with dozens of clients, and thousands of readers to make their Rails apps faster. What have I learned a...
- [3 ActiveRecord Mistakes That Slow Down Rails Apps: Count, Where and Present](https://www.speedshop.co/blog/three-activerecord-mistakes/): Many Rails developers don't understand what causes ActiveRecord to actually execute a SQL query. Let's look at three common cases: misuse of the count method...
- [The Complete Guide to Rails Performance, Version 2](https://www.speedshop.co/blog/rails-performance-version-two/): I've completed the 'second edition' of my course, the CGRP. What's changed since I released the course two years ago? Where do I see Rails going in the future?
- [A New Ruby Application Server: NGINX Unit](https://www.speedshop.co/blog/nginx-unit-for-ruby/): NGINX Inc. has just released Ruby support for their new multi-language application server, NGINX Unit. What does this mean for Ruby web applications? Should ...
- [Malloc Can Double Multi-threaded Ruby Program Memory Usage](https://www.speedshop.co/blog/malloc-doubles-ruby-
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