Unverified50% confidenceBenchmarkExact time
On 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.
1
Sources
50%
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.73% similarUnverifiedInteger 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.71% similarUnverifiedOn Skylake, the latency of single-precision floating-point division DIVSS is 11 cycles, double-precision DIVSD is 13–14 cycles, and the reciprocal throughput is approximately 3–5 cycles.64% similarUnverifiedRegister access latency is approximately 1 clock cycle, shared memory latency is approximately tens of clock cycles, and global memory latency can reach hundreds of clock cycles.64% 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63% similar
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