You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
31 lines
1.0 KiB
31 lines
1.0 KiB
// ----------------------------------------------------------------------------
|
|
/**
|
|
* A simple class to see what the Java system timer resolution is on your
|
|
* system.
|
|
*
|
|
* @author (C) <a href="mailto:vroubtsov@illinoisalumni.org">Vlad Roubtsov</a>, 2002
|
|
*/
|
|
public class SystemTimerResolution
|
|
{
|
|
// public: ................................................................
|
|
|
|
public static void main (final String [] args)
|
|
{
|
|
// JIT/hotspot warmup:
|
|
for (int r = 0; r < 3000; ++ r) System.currentTimeMillis ();
|
|
|
|
long time = System.currentTimeMillis (), time_prev = time;
|
|
|
|
for (int i = 0; i < 5; ++ i)
|
|
{
|
|
// busy wait until system time changes:
|
|
while (time == time_prev)
|
|
time = System.currentTimeMillis ();
|
|
|
|
System.out.println ("delta = " + (time - time_prev) + " ms");
|
|
time_prev = time;
|
|
}
|
|
}
|
|
|
|
} // end of class
|
|
// ----------------------------------------------------------------------------
|
|
|