How I Built a Lock-Free Actor Model in Go to Hit 30k+ RPS (Zero Allocs) When it comes to building an API traffic simulator or a load-testing tool, the hardest problem isn’t sending the HTTP requests—it’s measuring them. Most developers reach for traditional tools like JMeter (which uses heavy OS threads and consumes massive memory) or write scripts in interpreted languages like Python or JavaScript (Locust, k6) which introduce their own performance overheads. My primary motivation for building an open-source tool like Gopher-Glide ( gg ) was simple: I wanted something incredibly lightweight, easy to use, and capable of running standard .http files straight from my IDE. But simplicity shouldn't come at the cost of power. I wanted to see if I could build a tool this simple that could still match or exceed the raw performance of industry-standard tools like k6 , hey , or Locust . To achieve that kind of scale, I had to build a custom execution core in Go. I call it the Hive Engine .…