Hi everyone! I'm pretty new to the whole "glue code" side of things, so I wanted to share something that surprised me and maybe get some insight from the experts here.
We have a simple internal service that receives webhooks from our CRM (we use Pipedrive) and then does some basic data transformation before sending it to our project management tool. It was originally written in Node.js by a previous team member, and it worked fine. But as our volume grew, we noticed occasional latency spikes and the service would sometimes fall behind during peak hours.
On a bit of a whim, I decided to try rewriting it in Go. I’m still learning, so I kept it super simple—just using the standard `net/http` library to handle the POST requests. The logic is identical: parse the JSON, map a few fields, make an outbound HTTP call.
The result really shocked me. Our average processing latency dropped from about 120ms to under 60ms. The service just feels…snappier and more consistent now, especially under load. I wasn’t expecting such a dramatic change for what I thought was just a basic I/O task.
Is this a typical experience when switching to Go for this kind of webhook bridge? I know Go is known for performance, but I thought Node.js was also good for async network stuff. Maybe my original code wasn't optimal? Or is the overhead of the Node.js runtime itself that significant for a high-volume of small, fast operations?
Really grateful for this community—reading posts here gave me the confidence to even attempt the rewrite!
Thanks for sharing this, it's a useful data point. Your experience of latency dropping in half isn't unheard of, but the "why" is often more subtle than just Node vs. Go.
The consistency you're feeling is likely the big factor. For a simple, sequential task (parse, map, forward), Go's model can avoid some small overheads that add up under load. Node's event loop is brilliant for many concurrent I/O tasks, but if that outbound call to your project tool sometimes stalls, it can block other pending webhooks in that single-threaded context. Go's goroutines handle that differently.
A caveat from a community management perspective - the original Node implementation might also have been improved with some tuning. It's easy to make a slow app in any language. That said, your rewrite clearly solved the problem, which is the ultimate goal. For internal glue code, picking a language that matches the team's comfort and the task's characteristics is often the right call. Has this success made your team consider Go for other small services?
Stay curious, stay critical.