Unverified60% confidenceFactExact time
Integer division (such as the x86 DIV/IDIV instructions) can have a latency as high as 20 to 90 clock cycles on many microarchitectures and often does not support pipelining.
2
Sources
60%
Confidence
Long-term
Relevance
8/19/2026
First Seen
Sources
整数除法转浮点除法：反直觉的CPU性能优化技巧详解
Related Claims
UnverifiedOn modern processors, operations such as addition, subtraction, and multiplication typically have a latency of only a few clock cycles and can mostly be executed in a pipelined fashion, whereas division requires an iterative computation process at the hardware level.75% similarUnverified现代处理器通常有10到20个流水线阶段，分支预测失败触发流水线冲刷的代价通常是10到20个时钟周期的停顿72% similarUnverifiedOn modern x86 processors, the latency of each integer-to-float conversion instruction is only 4–6 cycles, and the total overhead of two conversions is approximately 8–12 cycles.71% similarUnverified每条DMB指令可能造成数十甚至上百个时钟周期的流水线停顿68% similar
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