Top all-time · #4060
FastRuby.io
Company blog · fastruby.io/blog · on HN as etagwerkerprogrammingweb
FastRuby.io is the company blog at fastruby.io, writing about programming and web. Since 2019, 19 different Hacker News readers have linked it 36 times, most often “How Fast is Ruby 3 on Rails?”. It is still writing: the last post was on 2026-10-27, and you can follow it by feed.
Too few sampled comments (4) to say how often HN recommends it.?
Why HN links it
Commenters cite FastRuby.io for Rails upgrade guidance, including a tag page of upgrade posts, and for a chart of Rails performance history across Ruby versions.
Summarised by Claude from a sample of 4 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Stuck on legacy Rails? We upgrade your Ruby on Rails application without interrupting product development. 100+ apps upgraded since 2012. Wrote the book on it.
Most-linked posts?
- How Fast is Ruby 3 on Rails?3 people · 3 mentions · first linked 2021-01-20
- Bundler-leak: A simple way to find known memory leaks2 people · 2 mentions · first linked 2019-08-29
- Upgrade Ruby from 2.7 to 3.02 people · 2 mentions · first linked 2021-03-17
- How and Why to Measure Dependency Freshness in Your Ruby Application2 people · 2 mentions · first linked 2023-12-14
- Exploring Ruby Warnings2 people · 2 mentions · first linked 2023-09-13
- Naming Things Is Hard2 people · 2 mentions · first linked 2022-08-09
- What I Learned from My First Rails Upgrade2 people · 2 mentions · first linked 2022-02-16
What Hacker News says?
So with the promised 3x speed improvement (hooray!), where does Ruby stand with regard to performance, compared to say Python? According to [this benchmark][1], it seems (the 3.0.0-preview1 version was) on average about 2x slower than Python. Are there other benchmarks to compare with? Looking into it, this other benchmark [2] of 3.0.0-preview1 vs Ruby 2.7 actually concludes there's no real performance improvement t…
Comment linking /blog/rails/performance/ruby/hows-the-performance-of-ruby-3.0.0-preview1.html
on “Ruby 3.0”Submitted Why Wasn't Ruby 3 Faster? as a story · 216 points
HN discussionThank you for replying to give more context. You have some courage to go to a Ruby project and try to upgrade Rails from 4 to 7. I hope it will go as smoothly as possible. Props to you! I am not sure if it helps and maybe you know these, but just in case here are 3 URLs I keep at hand when I upgrade Rails: 1. https://railsdiff.org (where it shows diff from sources) 2. https://www.fastruby.io/blog/tags/upgrades (they…
Comment linking /blog/tags/upgrades
on “To Ruby from Python”Submitted Naming Things Is Hard as a story · 47 points
HN discussionSince they left ruby (2.0) raw rails performance improved by 75% (3.0) https://www.fastruby.io/blog/assets/images/RRBPerfHistory_72... Then in 3.2, ruby released YJIT which improved median rails response time by about 100% https://raw.githubusercontent.com/easydatawarehousing/ruby_m... It's kind of a golden era for rubyists that stuck it out. Beautiful maintainable code that hits C performance for many tasks.
Comment linking /blog/assets/images/RRBPerfHistory_720.png
on “Building GitHub with Ruby on Rails”Submitted What I Learned from My First Rails Upgrade as a story · 31 points
HN discussionI've never read such a ridiculous article. I really wanted to give them the benefit of the doubt but good lord. How is any of this simpler or better? It's like they prefer the pain of 2004 mixed with the worst parts of modern infrastructure. The dream of the 2000s really is alive in DHH's head, isn't it? TFA links to their cloud spend for 2022[0], wherein lies the rub: > In total, we spent $3,201,564 on all these cl…
Comment linking /blog/rails/ruby/performance/how-fast-is-ruby-3-on-rails.html
on “De-cloud and de-K8s – Bringing our apps back home”Submitted DHH, AI, and the Future of Rails as a story · 5 points
HN discussionSubmitted Dangers in Your Gemfile as a story · 2 points
HN discussionSubmitted Deploying Rails on Fly.io as a story · 2 points
HN discussionSubmitted How Much Does It Cost to Upgrade Rails? as a story · 2 points
HN discussionSubmitted Exploring Ruby Warnings as a story · 2 points
HN discussionSubmitted Common Mistakes in Rails Upgrades as a story · 2 points
HN discussionSubmitted Friendlier UUID URLs in Ruby as a story · 2 points
HN discussionSubmitted How Fast is Ruby 3 on Rails? as a story · 2 points
HN discussionSubmitted How Fast is Ruby 3 on Rails? as a story · 2 points
HN discussionSubmitted DIY Ruby on Rails Upgrades: Essential Open Source Tools as a story · 1 points
HN discussionSubmitted Extracting Deprecation Warnings from the Rails Source Code – Fastruby.io as a story · 1 points
HN discussionSubmitted Rails database migrations best practices as a story · 1 points
HN discussionSubmitted Speeding Up Asset Precompilation in Rails-An Experiment with Vite, Esbuild, Bun as a story · 1 points
HN discussionSubmitted Dual-Boot Ruby on Rails Using Docker as a story · 1 points
HN discussionSubmitted Cracking the Case on Flaky Rails Tests as a story · 1 points
HN discussionSubmitted How and Why to Measure Dependency Freshness in Your Ruby Application as a story · 1 points
HN discussionSubmitted What's New in Ruby 3.3.0 as a story · 1 points
HN discussionSubmitted How and Why to Measure Dependency Freshness in Your Ruby Application as a story · 1 points
HN discussionSubmitted Exploring Ruby Warnings as a story · 1 points
HN discussionSubmitted Introduction to Rails Engines (how, why, and when to use them) as a story · 1 points
HN discussionSubmitted The Two Different Approaches We Take to Upgrade a Rails Application as a story · 1 points
HN discussionSubmitted Naming Things Is Hard – Fastruby.io – Rails Upgrade Service as a story · 1 points
HN discussionSubmitted What I Learned from My First Rails Upgrade as a story · 1 points
HN discussion
