How can you prevent compiler optimizations from eliminating the code you are trying to benchmark?

  • Use the volatile keyword.
  • Make the code more complex.
  • Use compiler-specific directives or intrinsics.
  • Increase the loop count in your benchmark.
Compiler optimizations can be a challenge when benchmarking. Using the volatile keyword doesn't guarantee that the code won't be optimized away in some cases. Making the code more complex isn't a reliable method either. To prevent compiler optimizations, you should use compiler-specific directives or intrinsics provided by the compiler, which can inform the compiler not to optimize specific sections of code. This ensures that the code you're trying to benchmark is executed as expected without unwanted optimizations.
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