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Hardware Counters with Perf Events

Hard · systems · Quant Developer interview question · systems, linux, performance, c++

Low-latency trading systems rely heavily on cache locality and efficient branch prediction to minimize execution time. Quantitative developers utilize hardware counters to profile code performance at the CPU level, identifying bottlenecks such as cache misses or branch mispredictions. Accessing these metrics programmatically allows for automated performance regression testing and optimization of critical components like order books. Task Implement the OrderBookProfiler class to measure specific