How can i measure the execution time of my program locally?
Java
start = System.currentTimeMillis(); // Program Start
end = System.currentTimeMillis(); // Program End
System.out.println("\n\nTime taken to copy in milliseconds: " +(end - start));
In unix, if your output file is called out.txt, you can get the execution time with the command time ./out.txt. Otherwise, you could just use functions from your programming language which measure the time at the start and end, and print out the difference.
If you use a newer compiler then you can use the following snippet
C++11 only
// Timing Code
#include <chrono>
typedef long long ll;
std::chrono::time_point<std::chrono::high_resolution_clock> start, end;
start = std::chrono::high_resolution_clock::now();
/*
Code goes here
*/
end = std::chrono::high_resolution_clock::now();
ll elapsed_time = std::chrono::duration_cast<std::chrono::milliseconds>(end-start).count();
cout << "\nElapsed Time: " << elapsed_time << "ms\n";
This question has been asked and answered before. Please refer to this: http://discuss.codechef.com/questions/7129/time-taken-by-codes-to-run?page=1#7135
admin, please, there is no way this would work !!!
time
in Unix shows the execution time of following command
time [command]
so for example if test is executable compiled for example from test.cpp, than one can use
time test > test.out
In general for all languages you can read up pages 17 to 24 of the following link:
Also for python:
import time
take all input here
t1 = time.perf_counter()
#insert code here
t2 = time.perf_counter()
print(t2-t1)
The above code returns the time. Ensure that t1 is defined right after taking input and t2 is initialised after all lines are run.
Here is a pythonic way
import time
start_time = time.time()
main()
print("--- %s seconds ---" % (time.time() - start_time))