The 185-Microsecond Type Hint
Summary
A micro-optimization in a Clojure Roughtime implementation yields a dramatic throughput boost by adding a type hint to a tight loop. The article analyzes a tiny bottleneck in encode-rt-message, explains how dynamic dispatch and reflection caused overhead, and shows end-to-end benchmarks that reveal a 13x improvement. It serves as a practical example of profiling-driven optimization in real-world systems.