There are 3 major points to consider when optimizing a Docker file: Build context size Cached layers Final image size Build context size The build context is the entirety of the disk contents for the folder containing your Dockerfile, except parts ignored by .dockerignore. …

Content security policies are a great way to lock down your website, and it can be relatively painless to get some benefit. (Photo by Piotr Hamryszczak) Recently I shipped a large project using some of the hot new tools in the React community—Gatsby and MDX—serving a global audience with about…

At 1:30pm on Wednesday, June 26th, hundreds of Wayfair employees walked out of the office after failing to reach an agreement with Wayfair’s executives about furnishing an ICE detention center. What I wanted to know is, how does a walkout happen? What is the sequence events that begins with somebody…

The world has gushed over Bitcoin and Ethereum, but the future doesn’t look so rosy. — I’ve loosely followed cryptocurrency for almost a decade. In 2011, I briefly mined Bitcoin (and Litecoin, when it became clear that GPU mining BTC was unlikely to net me much of a reward) from my college dorm room. Bitcoin’s proof-of-work algorithm to create a trustless ledger was a true innovation…

I’ve had a lot of jobs (8 since 2012), which means I’ve worked with a lot of teams. …

(Also published on my personal blog) React just announced a new feature: Hooks. It’s a brand new set of APIs that enables powerful new ways to share stateful logic between components, optimize performance without significant rewrites, get some of the benefits of Redux-style separation of concerns, and more. They also…

With modern JS tooling, we have an opportunity to use Javascript features before they are implemented in browsers or node. However, not all features are equal. Some are more likely than others to be integrated into the language. Some will undergo significant changes before being added, and some will be…

(Cover photo by Tobias A. Müller) There are a ton of “best practices” preached when talking about authoring software. Ways to improve performance, readability, maintainability, flexibility. Much of the advice is more dogmatic than pragmatic, though. When you’re actually shipping features, what you really need is code that isn’t a…

I love promises. They’re a fantastic model for asynchronous behavior, and await makes it very easy to avoid callback hell (though I'd argue promises do a great job of that on their own). …