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Bundler Changed Where Your Canonical Ruby Information Lives: What You Need to Know

Heroku bumped its Bundler version to 1.13.7 almost a month ago, and since then we've had a large number of support tickets opened, many a variant of the following: Your Ruby version is <X>, but your Gemfile specified <Y> I wanted to talk about why you might get this error while deploying to Heroku, and what you can do about it, along with some bonus features provided by the new Bundler version. Why? First off, why are you getting this error? On Heroku in our Ruby Version docs, we mention that you can use a Ruby directive in your Gemfile…

Ruby 2.4 Released: Faster Hashes, Unified Integers and Better Rounding

The Ruby maintainers continued their annual tradition by gifting us a new Ruby version to celebrate the holiday: Ruby 2.4 is now available and you can try it out on Heroku. Ruby 2.4 brings some impressive new features and performance improvements to the table, here are a few of the big ones: Binding#irb – Runtime Invocation for IRB Unified Integers – Fixnum and Bignum are now Integer Rounding Changes – More Accurate Kernel#sprintf Rounding Background: 32-bit vs 64-bit Word Length C Data Models Fixnum Sizes Across Rubies Proposed Changes Gaussian Rounding Hash Changes – Open Addressing for Cache Utilization via Full Cycle LCG Background: Processor Caching A DIY Hash: TurboHash Open Addressing Linear Probing The Linear Congruential…

Ruby 3×3: Matz, Koichi, and Tenderlove on the future of Ruby Performance

At RubyKaigi I caught up with Matz, Koichi, and Aaron Patterson aka Tenderlove to talk about Ruby 3×3 and our path so far to reach that goal. We discussed Koichi’s guild proposal, just-in-time compilation and the future of Ruby performance. Jonan: Welcome everyone. Today we are doing an interview to talk about new features coming in Ruby 3. I am here with my coworkers from Heroku, Sasada Koichi and Yukihiro Matsumoto, along with Aaron Patterson from GitHub. Jonan: So, last year at RubyKaigi you announced an initiative to speed up Ruby by three times by the release of version three.…

How Combatant Gentlemen Solved Service Discovery Using Heroku Private Spaces

Scott Raio is Co-Founder and CTO of Combatant Gentlemen], a design-to-delivery menswear e-commerce brand. What microservices are you running in Heroku Private Spaces? We’ve written an individual service for every business use case. For example, we have services for order processing, product catalog, account management, authentication, swatch display, POs, logistics, payments, etc. With all these different services, we chose Heroku Private Spaces as a way to make service discovery easier. We’re currently running about 25 services, which is a relatively small number compared to Netflix or Twitter (who employ hundreds of services). But we’re growing, and we’re always evaluating our…

Where Will Ruby Go Now? Talking with Tenderlove at RailsConf

Last week at RailsConf in Kansas City, Terence Lee and Richard Schneeman of Heroku’s Ruby Task Force sat down with the legendary Aaron Patterson (AKA tenderlove). Aaron has been working hard to make Ruby three times faster — a goal that Matz called Ruby 3×3. Along the way, Aaron has discovered that Ruby may face a hard decision. On one side, Ruby can continue to be the productive, general-purpose scripting language that it looks like today. But the other side of Ruby is that it’s used to run long-running processes in Rails applications, pushing it to be more performant, strongly-typed,…

Real-Time Rails: Implementing WebSockets in Rails 5 with Action Cable

It's been one year since Action Cable debuted at RailsConf 2015, and Sophie DeBenedetto is here to answer the question in the minds of many developers: what is it really like to implement "the highlight of Rails 5"? Sophie is a web developer and an instructor at the Flatiron School. Her first love is Ruby on Rails, although she has developed projects with and written about Rails, Ember and Phoenix. Recent years have seen the rise of "the real-time web." Web apps we use every day rely on real-time features—the sort of features that let you see new posts magically…

Container-Ready Rails 5

Rails 5 will be the easiest release ever to get running on Heroku. You can get it going in just five lines: $ rails new myapp -d postgresql $ cd myapp $ git init . ; git add . ; git commit -m first $ heroku create $ git push heroku master These five lines (and a view or two) are all you need to get a Rails 5 app working on Heroku — there are no special gems you need to install, or flags you must toggle. Let's take a peek under the hood, and explore the interfaces baked…

Cyber Monday, No Sweat: Why Sweet Tooth Chose PaaS

We recently sat down for a chat with Bill Curtis, a co-founder and the CTO of Sweet Tooth (Now Smile.io), a points and rewards app for online stores worldwide. What has been your greatest challenge? We’re serving way more data today than we ever have, so scaling is mission-critical. In the past, we’ve struggled with traffic spikes. For example, there are seasonal spikes, like Black Friday or Cyber Monday. There are also spikes from merchant activity, such as load testing stores or importing a large number of orders. I recently tweeted our requests-per-hour graph. It showed that during the huge…

Building a P2P Marketplace on Heroku: An Interview with Vitali Margolin

Based in Tel Aviv, Israel, Vitali Margolin is the Head of R&D for Roomer. Vitali leads a team of seven developers who built and operate the travel marketplace www.roomertravel.com and the travel protection service Life Happens, both running on Heroku. What are you running on Heroku? The four big projects are: the Roomer website, our administration app, our partner network and B2B website, and the Roomer API. The Roomer API is our highest load app. It can get up to 10k requests per minute from partner integrations such as Kayak. We have a few more technical products, including an app…

How Lean Poker Teaches Continuous Deployment on Heroku: An Interview with Creator Rafael Ördög

In 2013, Rafael Ördög put poker and code together, the result: Lean Poker, a competitive coding event that teaches continuous deployment and lean startup methodologies. Rafael is based in Budapest, Hungary. What's Lean Poker? Lean Poker is a coding workshop that is designed to teach people how to practice continuous deployment and lean startup methodologies. Companies can sponsor a free public event or hold an internal, team-building event for their own employees. The basic starting code is really simple and teams can use the language of their choice. The challenge is not to understand an existing code base but to…

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