C++ : Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_p

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C++ : Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_u64 on Intel CPUs
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C++ : Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_u64 on Intel CPUs
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