Counts count(const std::vector<std::wstring>& files)
{
Counts map;
Concurrency::concurrent_vector<int> vec;
Concurrency::parallel_for_each(files.begin(), files.end(), [&vec](std::wstring file) {
std::ifstream input(file);
std::string line;
while (std::getline(input, line)!=0) {
if (line.size()>6 && boost::starts_with(line, "DYEAR=")) {
try {
int year = boost::lexical_cast<int>(line.substr(6));
vec.push_back(year);
break;
}
catch (boost::bad_lexical_cast&)
{}
}
}
});
std::for_each(vec.begin(), vec.end(), [&map](int i) {
map[i]++;
});
return map;
}
static void BM_MSVC_concurrent_vector(benchmark::State &state)
{
Concurrency::concurrent_vector<double> vec;
for (auto _ : state)
{
vec.push_back(3.1415926);
vec.push_back(2.71828);
vec.push_back(3.1415926);
vec.push_back(42);
vec.push_back(0);
}
}