Title: Navigating the WebAssembly Tangle

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July 25, 2022. The tech world is a sprawling mess of new tools and frameworks, each vying for your attention like a toddler at a buffet. ChatGPT blew us all away with its promise, but now we’re drowning in AI and LLM infrastructure. Platform engineering isn’t just a buzzword anymore—it’s a full-fledged career track, with teams dedicated to building the best developer experience.

In the midst of this chaos, I found myself wrestling with WebAssembly on the server side. It was like trying to untangle a ball of Christmas lights—every connection seemed to be tangled up in another. But unlike those lights, once you pull one end through, it all starts falling into place.

Our team at work had been tasked with building out our platform’s support for WebAssembly applications. We wanted to enable developers to write server-side code in any language that compiled to WASM—think Rust, C++, even Go. The idea was thrilling: what if we could bring the efficiency of native code to a cloud environment where it’s typically slower than anything you can get on a local machine?

I started with the basics: setting up a simple project and deploying it as a serverless function in our cloud provider’s ecosystem. It worked, but only just. The performance was decent, but we were missing out on some of the more advanced features that WebAssembly has to offer.

One of the big hurdles I ran into was figuring out how to manage dependencies. WebAssembly is compiled code, so you can’t simply npm install a bunch of packages and expect them to work out of the box. We had to find ways to package and deploy those dependencies alongside our WASM modules. This led me down a rabbit hole of tooling and configuration that felt like navigating a maze.

I spent hours poring over documentation, trying different approaches, and debugging issues that seemed to appear from nowhere. One particularly frustrating moment was when I managed to get everything running in a local development environment but couldn’t replicate the setup in our CI/CD pipeline. It turned out to be a simple misconfiguration of file paths—something I could have fixed with a quick ls command if only I had checked earlier.

The other challenge was balancing performance and security. WebAssembly is great because it’s safe by design, but that safety comes at the cost of some runtime flexibility. We needed to ensure that our WASM applications were isolated from each other and couldn’t potentially cause harm or slowdowns in production environments.

After weeks of tinkering, we finally landed on a solution that worked reasonably well. We used Docker containers to package both the WebAssembly modules and their dependencies, ensuring that everything was self-contained and secure. The performance improvements were significant enough to make it worth the effort.

As I look back at this project, I can’t help but laugh at how much of my time was spent on mundane tasks like debugging file paths and getting environment variables set up correctly. But in the end, seeing a fully functional WebAssembly application running as a serverless function was incredibly rewarding. It’s moments like these that remind me why I love working with infrastructure—it’s never boring.

The tech world is always moving forward, and sometimes it feels like you’re just trying to keep up. But that’s part of the fun—figuring out new solutions, learning from mistakes, and ultimately making something better than what we started with. Whether it’s WebAssembly or the next big thing, I’m excited to see where this journey takes us.

Until then, back to the keyboard and another line of code…