Common C++ classes and routines used by my applications such as argument parser, IO and conversion utilities
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 

65 lines
2.3 KiB

#include "../conversion/stringbuilder.h"
#include "../conversion/stringconversion.h"
#include "../chrono/datetime.h"
#include <vector>
#include <iostream>
#include <sstream>
using namespace std;
using namespace ConversionUtilities;
using namespace ChronoUtilities;
int main()
{
cout << "Benchmarking string builder vs. stringstream" << endl;
constexpr unsigned int iterations = 500000;
constexpr unsigned int iterations2 = 50;
vector<string> v1, v2;
v1.reserve(iterations);
v2.reserve(iterations);
DateTime t1 = DateTime::exactGmtNow();
for(unsigned int r = 0; r < iterations2; ++r) {
for(unsigned int i = 0; i < iterations; ++i) {
stringstream ss;
v1.emplace_back("left. "s + numberToString(i + 1) + "; right: "s + numberToString(i + 2) + "; top: "s + numberToString(i + 3) + "; bottom: "s + numberToString(i + 4) + ';');
}
v1.clear();
}
DateTime t2 = DateTime::exactGmtNow();
cout << "plus operator: " << (t2 - t1).toString(TimeSpanOutputFormat::Normal, true) << endl;
t1 = DateTime::exactGmtNow();
for(unsigned int r = 0; r < iterations2; ++r) {
for(unsigned int i = 0; i < iterations; ++i) {
stringstream ss;
ss << "left: "s << (i + 1) << "; right: "s << (i + 2) << "; top: "s << (i + 3) << "; bottom: "s << (i + 4) << ';';
v1.emplace_back(ss.str());
}
v1.clear();
}
t2 = DateTime::exactGmtNow();
const TimeSpan diff1 = t2 - t1;
cout << "stringstream: " << diff1.toString(TimeSpanOutputFormat::Normal, true) << endl;
t1 = DateTime::exactGmtNow();
for(unsigned int r = 0; r < iterations2; ++r) {
for(unsigned int i = 0; i < iterations; ++i) {
v2.emplace_back("left. "s % (i + 1) % "; right: "s % (i + 2) % "; top: "s % (i + 3) % "; bottom: "s % (i + 4) + ';');
}
v2.clear();
}
t2 = DateTime::exactGmtNow();
const TimeSpan diff2 = t2 - t1;
cout << "string builder: " << diff2.toString(TimeSpanOutputFormat::Normal, true) << endl;
v1.swap(v2);
cout << "diff (stringstream minus string builder): " << (diff1 - diff2).toString(TimeSpanOutputFormat::Normal, true) << endl;
cout << "factor (stringstream / string builder): " << (static_cast<double>(diff1.totalTicks()) / diff2.totalTicks()) << endl;
return 0;
}