The Honeybadger developer blog

Tutorials, product info and good advice from the Honeybadger crew.

Load Test Your Rails Apps with Apache JMeter

Every Rails app has a breaking point; a level of activity that it simply cannot handle. Your braking point depends on big architectural decisions, yes — and also on the tiniest changes committed by your most junior developer. That's why it's vital to regularly test your application's performance under load. In this article, Milap Neupane gives us a Rails-centric introduction to load testing with a powerful open-source tool called JMeter.

Web Development in Go: Middleware, Templating, Databases & Beyond

Many of the concepts you're already familiar with as a web developer are applicable in Go. In this article, Ayooluwa Isaiah shows us how middleware, templating, and other aspects of the go language work together to create a coherent web-development experience.

A big change: Accounts

In which we discuss upgrading our quirky billing system.

Understanding Object Instantiation and Metaclasses in Python

If you're coming to Python from another language, it's normal to feel a little confused about object instantiation and inheritance - especially when people start talking about "metaclasses." In this article, Rupesh Mishra explains how instantiation, inheritance, and - yes - even metaclasses work in Python.

Exploring Merge Sort with Ruby

You'll probably never implement sorting from scratch. But sorting algorithms are foundational in computer science and have become a standard feature of the ritual hazing...er...interview process for developers at all levels. In this article, Julie Kent introduces us to the merge sort algorithm. She'll show us how it works, implement it in ruby, and discuss its performance characteristics.

Building a Programming Language in Ruby: The Parser

Understanding parsers is like seeing the matrix. You start to understand the tree-like structure of your code. You begin to realize that so many language features are just syntactic sugar concealing a simple core. In this article, Alex Braha Stoll will guide us through the world of parsers. He'll explain basic concepts, then use Ruby to implement a simple parser for his toy language, Stoffle.

Conditionally deploying parts of your CloudFormation stack with the Serverless Framework

What do you do when you want to customize which resources are deployed via CloudFormation?

Everything You Ever Wanted To Know About View Caching In Rails

If you've ever built a UI in Rails, you've probably noticed that views tend to get slower over time. That's because adding features to a UI often means adding DB queries to the view. They add up. Fortunately, Rails provides us with an easy-to-apply band-aid in the form of view caching. In this article, Jonathan Miles introduces us to view caching, discusses when it's appropriate to use, and covers common pitfalls to watch out for.

Test-Commit-Revert: A Useful Workflow for Testing Legacy Code in Ruby

When you inherit a legacy app with no tests, your first step should be to add them. But that can be a huge task! How do you even start? In this article, José will introduce us to a testing workflow called test-commit-revert (TCR) that is particularly useful for adding tests to legacy systems. He'll show us practical examples and help us set up our tooling for minimal friction.

Currency Calculations in Ruby

You're doing some currency calculations in your app. It seems to be working well. But after a while, strange discrepancies emerge. The books stop balancing. People get mad. All because the code treated currency like any other number. In this article, Julio Sampaio shows us which of Ruby's number classes are unsuitable for currency, and walks us through better options.
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