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Developer Tools

WebSockets now Generally Available

WebSocket support was introduced as a Labs feature last year, and we went through extensive testing and a number of technical iterations to improve performance and to provide a predictable compliance target. Thanks to great interaction with the community and early feature users, we now have a fast and robust solution available in production.

Why WebSockets

WebSockets provide bi-directional and full-duplex channels, allowing you to create applications with support for streaming, flexible protocols, and …

Introducing the app.json Application Manifest

Developers want to spend less time setting up applications and start working with the code sooner. Setting up applications is error-prone, time consuming and interruptive to the development flow. Often, there are several steps to go from your code or other samples and templates that you find in repositories online, to a running application that you can continue to work on.

Today, we are excited to introduce the app.json manifest. app.json enables developers to …

Introducing the Heroku HTTP API Toolkit

Today we’re open sourcing the toolchain Heroku uses to design, document, and consume our APIs. We hope this shows how Heroku thinks about APIs and gives you new tools to create your own APIs.

10 Habits of a Happy Node Hacker

This post is from 2014 – check out the update!

For most of the nearly twenty years since its inception, JavaScript lacked many of the niceties that made other programming languages like Python and Ruby so attractive: command-line interfaces, a REPL, a package manager, and an organized open-source community. Thanks in part to Node.js and npm, today's JavaScript landscape is dramatically improved. Web developers wield powerful new tools, and are limited only by their imagination.

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Git Push Heroku Master: Now 40% Faster

Flow is an important part of software development. The ability to achieve flow during daily work makes software development a uniquely enjoyable profession. Interruptions in your code/test loop make this state harder to achieve. Whether you are running unit tests locally, launching a local webserver, or deploying to Heroku there's always some waiting and some interruption. Every second saved helps you stay in your flow.

We’ve been working on reducing the time it takes to …

Auto-generating a Go API client for Heroku

Editor's note: This is a cross post from Blake Gentry, an engineer at Heroku.

This is a post about the recently announced Heroku Platform API JSON Schema and how I used that schema to write an auto-generated Go client for the API.

Heroku's API team has spent a large part of the past year designing a new version of the platform API. While this is the 3rd incarnation of the API, neither of the …

Waza 2013: How Ecosystems Build Mastery

When we think of the concept of Waza (技) or "art and technique," it's easy to get caught up in the idea of individual mastery. It's true that works of art are often created by those with great skill, but acquiring that skill is neither solitary nor static. Generations of masters contribute to a canon and it is in that spirit that we built the Heroku platform and the Waza event. This year's Waza was …

Adding Concurrency to Rails Apps with Unicorn

With support for Node.js, Java, Scala and other multi-threaded languages, Heroku allows you to take full advantage of concurrent request processing and get more performance out of each dyno. Ruby should be no exception.

If you are running Ruby on Rails with Thin, or another single-threaded server, you may be seeing bottlenecks in your application. These servers only process one request at a time and can cause unnecessary queuing. Instead, you can improve performance by …

Run JRuby on Heroku: Ruby with JVM-Based Libraries

Over a year ago Heroku launched the Cedar stack and the ability to run Java on our platform. Java is known as a powerful language – capable of performing at large scale. Much of this potential comes from the JVM that Java runs on. The JVM is the stable, optimized, cross-platform virtual machine that also powers other languages including Scala and Clojure. Starting today you can leverage the power of the JVM in your …

Presenting the New Add-ons Site

Heroku Add-ons make it easy for developers to extend their applications with new features and functionality. The Add-on Provider Program has enabled cloud service providers with key business tools, including billing, single sign-on, and an integrated end-user support experience. Since the launch of the Heroku Add-ons site over two years ago, the marketplace has grown to nearly 100 add-ons. As the add-ons ecosystem has grown, we've learned a lot about how cloud service providers structure …

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