Why We Abandoned Java for Our Treasure Hunt Engine and Embraced the Complexity of Rust

pretty ncube Posted on May 30 Why We Abandoned Java for Our Treasure Hunt Engine and Embraced the Complexity of Rust # webdev # programming # rust # performance The Problem We Were Actually Solving I still remember the day our team realized that our Java-based treasure hunt engine was not going to cut it. We were building a massive online game with a custom engine, and performance was a major concern. The engine was responsible for handling thousands of concurrent players, each with their own set of actions and movements. Our Java implementation was struggling to keep up, with latency numbers averaging around 500ms. We tried to optimize the code, reducing object allocations and improving parallelism, but it soon became clear that the language itself was the constraint. The garbage collector was pausing the application for up to 200ms at a time, causing frustrating lag spikes for our players. We knew we had to make a change, but we were hesitant to abandon the familiarity of Java. What We Tried First (And Why It Failed) Before making the switch to Rust, we tried to tweak our Java configuration to see if we could squeeze out some more performance. We experimented with different garbage collector settings, trying to find the perfect balance between throughput and pause times. We also tried using profiling tools like YourKit to identify and optimize hotspots in the code. However, despite our best efforts, we just could not get the performance we needed. The engine was still struggling to handle the load, and we were starting to receive complaints from our players about the lag. It was then that we decided to take a closer look at Rust, a language that had been gaining popularity for its focus on performance and memory safety. We were attracted to its concept of ownership and borrowing, which seemed to offer a more efficient and predictable way of managing memory. The Architecture Decision After several weeks of experimentation and debate, we finally decided to take the