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std::chrono::steady_clock::now

Da cppreference.com.
< cpp‎ | chrono‎ | steady clock

 
 
Utilità libreria
Tipo di supporto (basic types, RTTI, type traits)
Gestione della memoria dinamica
La gestione degli errori
Programma di utilità
Funzioni variadic
Data e ora
Funzione oggetti
initializer_list(C++11)
bitset
hash(C++11)
Gli operatori relazionali
Original:
Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Coppie e tuple
Original:
Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
Swap, in avanti e spostare
Original:
Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
 
std::chrono::steady_clock
Membri funzioni
Original:
Member functions
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steady_clock::now
 
(dal C++11)
Restituisce un punto temporale che rappresenta il momento attuale.
Original:
Returns a time point representing with the current point in time.
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Indice

[modifica] Parametri

(Nessuno)
Original:
(none)
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[modifica] Valore di ritorno

Un punto ora che rappresenta l'ora corrente.
Original:
A time point representing the current time.
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[modifica] Eccezioni

noexcept specification:  
noexcept
  (dal C++11)

[modifica] Esempio

#include <iostream>
#include <vector>
#include <chrono>
 
int main()
{
    for (unsigned long long size = 1; size < 10000000; size *= 10) {
        auto start = std::chrono::steady_clock::now();
        std::vector<int> v(size, 42);
        auto end = std::chrono::steady_clock::now();
 
        auto elapsed = end - start;
        std::cout << size << ": " << elapsed.count() << '\n';
    }
}

Possible output:

1: 1
10: 2
100: 3
1000: 6
10000: 47
100000: 507
1000000: 4822