C++常用库
2021-05-30 05:04
标签：seconds second class nose lis type int const time 计时 C++常用库 标签：seconds second class nose lis type int const time 原文地址：https://www.cnblogs.com/xiaohuidi/p/14757673.html /// nanoseconds
typedef duration<_glibcxx_chrono_int64_t nano> nanoseconds;
/// microseconds
typedef duration<_glibcxx_chrono_int64_t micro> microseconds;
/// milliseconds
typedef duration<_glibcxx_chrono_int64_t milli> milliseconds;
/// seconds
typedef duration<_glibcxx_chrono_int64_t> seconds;
/// minutes
typedef duration<_glibcxx_chrono_int64_t ratio>60>> minutes;
/// hours
typedef duration<_glibcxx_chrono_int64_t ratio>3600>> hours;
const auto tp_1 = std::chrono::steady_clock::now();
matcher->match(desc_1, desc_2, matches);
const auto tp_2 = std::chrono::steady_clock::now();
const auto track_time = std::chrono::duration_cast<:chrono::milliseconds>(tp_2 - tp_1).count();
td::cout"match_time: ""ms"