大约有 44,000 项符合查询结果（耗时：0.0236秒） [XML]
Does Parallel.ForEach limit the number of active threads?
... {
monitor.Add(monitor.Count);
System.Threading.Thread.Sleep(1000);
monitor.TryTake(out int result);
monitorOut.Add(result);
});
Console.WriteLine("Max concurrency: " + monitorOut.OrderByDescending(x => x).First());
}
I haven't made any changes yet ...
How to use QueryPerformanceCounter?
...(li.QuadPart-CounterStart)/PCFreq;
}
int main()
{
StartCounter();
Sleep(1000);
cout << GetCounter() <<"\n";
return 0;
}
This program should output a number close to 1000 (windows sleep isn't that accurate, but it should be like 999).
The StartCounter() function record...
Numpy - add row to array
...0 rows, one at a time:
import numpy as np
from time import perf_counter, sleep
def time_it():
# Compare performance of two methods for adding rows to numpy array
py_array = [[0, 1, 2], [0, 2, 0]]
py_row = [4, 5, 6]
numpy_array = np.array(py_array)
numpy_row = np.array([4,5,6])...
How to catch an Exception from a thread
...read() {
@Override
public void run() {
System.out.println("Sleeping ...");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
System.out.println("Interrupted.");
}
System.out.println("Throwing exception ...");
...
How to Calculate Execution Time of a Code Snippet in C++
...lt;< a << std::endl;
}
{
NLTimerScoped timer( "sleep( 4 )" );
sleep( 4 );
}
return 0;
}
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How do you print in a Go test using the “testing” package?
...lel()
for i := 0; i < 15; i++ {
t.Logf("%d", i)
time.Sleep(3 * time.Second)
}
}
func TestBar(t *testing.T) {
t.Parallel()
for i := 0; i < 15; i++ {
t.Logf("%d", i)
time.Sleep(2 * time.Second)
}
}
func TestBaz(t *testing.T) {
t.Parallel()
...
Do zombies exist … in .NET?
...("test.txt", FileMode.OpenOrCreate);
while (true)
{
Thread.Sleep(1);
}
GC.KeepAlive(file);
}
Despite making some pretty awful mistakes, the handle to "test.txt" is still closed as soon as Abort is called (as part of the finalizer for file which under the covers uses SafeFil...
Creating a daemon in Linux
...nize.c
* This example daemonizes a process, writes a few log messages,
* sleeps 20 seconds and terminates afterwards.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sy...
How does facebook, gmail send the real time notification?
... perhaps like the following pseudocode:
while(!has_event_happened()) {
sleep(5);
}
echo json_encode(get_events());
The has_event_happened function would just check if anything had happened in an events table or something, and then the get_events function would return a list of the new rows i...
Do C# Timers elapse on a separate thread?
...
static void timer_Elapsed(object sender, ElapsedEventArgs e)
{
Thread.Sleep(2000);
Debug.WriteLine(Thread.CurrentThread.ManagedThreadId);
}
you will get something like this
10
6
12
6
12
where 10 is the calling thread and 6 and 12 are firing from the bg elapsed event.
If you remove the ...