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chore: parameterize benchmark constants
Co-authored-by: blueloveTH <28104173+blueloveTH@users.noreply.github.com>
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@ -3,6 +3,9 @@
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#include <stdio.h>
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#include <time.h>
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#define ARRAY_SIZE 1000
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#define NUM_ROUNDS 100000
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static inline uint64_t nanos(void) {
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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@ -10,36 +13,36 @@ static inline uint64_t nanos(void) {
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}
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static uint64_t bench_int(void) {
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int arr[1000];
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for (int i = 0; i < 1000; ++i) arr[i] = 1;
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int arr[ARRAY_SIZE];
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for (int i = 0; i < ARRAY_SIZE; ++i) arr[i] = 1;
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volatile long long total = 0;
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uint64_t start = nanos();
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for (int round = 0; round < 100000; ++round) {
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for (int round = 0; round < NUM_ROUNDS; ++round) {
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long long sum = 0;
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for (int i = 0; i < 1000; ++i) sum += arr[i];
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for (int i = 0; i < ARRAY_SIZE; ++i) sum += arr[i];
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total += sum;
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}
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uint64_t end = nanos();
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// prevent optimization
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if (total == 0) printf("unused: %lld\n", total);
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return (end - start) / 100000;
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return (end - start) / NUM_ROUNDS;
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}
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static uint64_t bench_char(void) {
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char arr[1000];
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for (int i = 0; i < 1000; ++i) arr[i] = 1;
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char arr[ARRAY_SIZE];
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for (int i = 0; i < ARRAY_SIZE; ++i) arr[i] = 1;
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volatile long long total = 0;
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uint64_t start = nanos();
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for (int round = 0; round < 100000; ++round) {
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for (int round = 0; round < NUM_ROUNDS; ++round) {
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long long sum = 0;
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for (int i = 0; i < 1000; ++i) sum += arr[i];
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for (int i = 0; i < ARRAY_SIZE; ++i) sum += arr[i];
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total += sum;
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}
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uint64_t end = nanos();
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if (total == 0) printf("unused: %lld\n", total);
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return (end - start) / 100000;
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return (end - start) / NUM_ROUNDS;
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}
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int main(void) {
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