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C# 'is' operator performance
...ders are heir to. 'Tis a closure Devoutly to be wish'd. To die, no, but to sleep; Yes I shall sleep, perchance to dream of is and as in what may be derived from the most base of class.
– Jared Thirsk
Dec 6 '09 at 21:52
...
Verify a certificate chain using openssl verify
... exit 23; }
PID=
kick() { [ -n "$PID" ] && kill "$PID" && sleep .2; PID=; }
trap 'kick' 0
serve()
{
kick
PID=
openssl s_server -key "$KEY" -cert "$CRT" "$@" -www &
PID=$!
sleep .5 # give it time to startup
}
check()
{
while read -r line
do
case "$line" in
'Verify re...
The difference between fork(), vfork(), exec() and clone()
...wake concurrently since they will influence each other. So the father will sleep at the end of "do_fork()" and awake when child call exit() or execve() since then it will own new page table. Here is the code(in do_fork()) that the father sleep.
if ((clone_flags & CLONE_VFORK) && (retval...
asynchronous vs non-blocking
... if (msg is not empty)
{
break;
}
else
{
sleep(2000); // 2 sec
}
}
// thread Y
// prepare the book for X
send(X, book);
You can see that this design is non-blocking (you can say that most of time this loop does something nonsense but in CPU's eyes, X is runnin...
What is a “callback” in C and how are they implemented?
.../ do other things while waiting for a connection. In this case
// just sleep for a while.
Sleep(30000);
}
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...
How can I profile Python code line-by-line?
...icalThread(
profiler=profiler,
)
with statistical_profiler_thread:
sleep(n)
# Likewise, process profile content
Code annotation output format is much like line profiler:
$ pprofile --threads 0 demo/threads.py
Command line: ['demo/threads.py']
Total duration: 1.00573s
File: demo/threads.p...
Declaring variables inside loops, good practice or bad practice?
...lass
{
public:
//constructor
myTimeEatingClass()
{
sleep(2000);
ms_usedTime+=2;
}
~myTimeEatingClass()
{
sleep(3000);
ms_usedTime+=3;
}
const unsigned int getTime() const
{
return ms_usedTime;
...
Why is lock(this) {…} bad?
...()
{
lock (this)
{
System.Threading.Thread.Sleep(10000);
}
}
}
class Program
{
static void Main(string[] args)
{
var nancy = new Person {Name = "Nancy Drew", Age = 15};
var a = new Thread(nancy.LockThis);
a.Start();
...
Linux的诞生和发展 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...内核版本。
0.12 (1992.1.15)主要加入对数学协处理器的软件模拟程序。
0.95 (0.13) (1992.3.8) 开始加入虚拟文件系统思想的内核版本。
0.96 (1992.5.12)开始加入网络支持和虚拟文件系统VFS。
0.97 (1992.8.1)
0.98 (1992.9.29)
0.99 (1992.12.13)
1.0 (1...
Get Character value from KeyCode in JavaScript… then trim
...Command Key (Mac)
"", // [92]
"CONTEXT_MENU", // [93]
"", // [94]
"SLEEP", // [95]
"NUMPAD0", // [96]
"NUMPAD1", // [97]
"NUMPAD2", // [98]
"NUMPAD3", // [99]
"NUMPAD4", // [100]
"NUMPAD5", // [101]
"NUMPAD6", // [102]
"NUMPAD7", // [103]
"NUMPAD8", // [104]
"NUMPAD9", //...