23 lines
644 B
C
23 lines
644 B
C
#include <stdio.h>
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#include <time.h>
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int main() {
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struct timespec t0, t1;
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long int i = 0;
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register long int x = 0;
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clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &t0);
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for (; i < 1000; ++i)
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printf("%ld ", i + 1);
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clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &t1);
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printf("\n%ldns took usual var", (t1.tv_sec - t0.tv_sec) * (long)1e9 + (t1.tv_nsec - t0.tv_nsec));
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printf("\n\n");
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clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &t0);
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for (; x < 1000; ++x)
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printf("%ld ", x + 1);
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clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &t1);
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printf("\n%ldns took register var", (t1.tv_sec - t0.tv_sec) * (long)1e9 + (t1.tv_nsec - t0.tv_nsec));
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}
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