The fast path and slow path dichotomy is fundamental, but implementing it well requires isolating concerns, monitoring workload shifts, and optimizing the common case without letting the rare case contaminate it.
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Learn how to identify the fast and slow paths in your code and keep the common case fast. This video uses flame graphs and histograms to show the divergence and offers three techniques to design for the hot path.
The Fast Path and the Slow Path
0.500 USDCHigh-performance systems split every operation into a fast path for the common case and a slow path for correctness. Designing that split well is the difference between a system that scales and one that stalls.