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Easy · low_latency · Quant Developer interview question · always_inline, noinline, attributes, low_latency, tick-rounding, hot-path
In high-frequency trading, order management systems must perform tick-rounding on millions of prices per second, demanding minimal latency. The C++ compiler's __attribute__((always_inline)) and __attribute__((noinline)) annotations provide explicit control over function inlining, which is critical for optimizing hot-path performance by eliminating function call overhead. This technique ensures predictable, ultra-low latency for core trading functions by separating them from non-critical cold-pat
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