Function count_milliseconds

src/util/time.h:41–41

 */
constexpr int64_t count_seconds(std::chrono::seconds t) { return t.count(); }
constexpr int64_t count_milliseconds(std::chrono::milliseconds t) { return t.count(); }
constexpr int64_t count_microseconds(std::chrono::microseconds t) { return t.count(); }

using SecondsDouble = std::chrono::duration<double, std::chrono::seconds::period>;