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  1. #include <stdio.h>
  2. #include <stdint.h>
  3. #ifdef _MSC_VER
  4. #include <intrin.h>  // For Windows (MSVC compiler)
  5. #else
  6. #include <x86intrin.h>  // For GCC/Clang on x86 platforms
  7. #endif
  8.  
  9. int main() {
  10.     uint64_t start_time, end_time, time_diff;
  11.     int i, loop_count = 1000000;
  12.  
  13.     // Get start time (in CPU cycles)
  14.     start_time = __rdtsc();
  15.  
  16.     // Loop to measure
  17.     for (i = 0; i < loop_count; i++) {
  18.         __asm__ __volatile__("nop");  // No-operation to simulate work
  19.     }
  20.  
  21.     // Get end time (in CPU cycles)
  22.     end_time = __rdtsc();
  23.  
  24.     // Calculate time difference
  25.     time_diff = end_time - start_time;
  26.  
  27.     // Print the time taken in CPU cycles
  28.     printf("Time taken: %llu cycles\n", time_diff);
  29.  
  30.     return 0;
  31. }
Success #stdin #stdout 0s 5288KB
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stdin
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Standard input is empty
stdout
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Time taken: 946936 cycles
https://ideone.com/5msi6I
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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