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Medium · concurrency · Quant Developer interview question · graph, topological-sort, critical-path, concurrency, c++
High-frequency trading systems rely on multiple critical subsystems—such as market data feeds, order management, and risk controls—that must be fully initialized before the main trading loop begins. Modern implementations often use latch-based synchronization to ensure dependent components wait for their prerequisites, forming a directed acyclic graph of initialization phases. Simulating and optimizing this startup sequence is crucial for minimizing system downtime and reducing time-to-market la