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change benchmark to calculate deviation on the fly

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overflowerror 2024-01-18 00:13:27 +01:00
parent b920b78d09
commit fd07b9b1f1
1 changed files with 21 additions and 6 deletions
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27
c++/turing/benchmark.cpp
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@ -38,15 +38,30 @@ void resetTestData() {
int main() {
resetTestData();
auto t1 = high_resolution_clock::now();
double sum = 0;
double sum_squared = 0;
for (int i = 0; i < CASES; i++) {
if (test(inputs[i]) != results[i]) {
auto t1 = high_resolution_clock::now();
bool result = test(inputs[i]);
auto t2 = high_resolution_clock::now();
if (result != results[i]) {
cout << i << ": " << inputs[i] << ", " << results[i] << " -> "<< "FAIL" << endl;
}
}
auto t2 = high_resolution_clock::now();
duration<double, std::milli> ms = t2 - t1;
cout << ms.count() << " ms, " << (ms.count() / CASES) << " ms/case" << endl;
duration<double, std::milli> ms = t2 - t1;
double tmp = ms.count();
sum += tmp;
sum_squared += tmp * tmp;
}
double mu = sum / CASES;
// from https://en.wikipedia.org/wiki/Standard_deviation#Rapid_calculation_methods
double sigma = sqrt(CASES * sum_squared - sum * sum) / CASES;
cout << "mu = " << mu << " ms, sigma = " << sigma << " ms\n";
}