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Node.js and CPU intensive requests
I've started tinkering with Node.js HTTP server and really like to write server side Javascript but something is keeping me from starting to use Node.js for my web application.
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Greenlet Vs. Threads
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Greenlets provide concurrency but not parallelism. Concurrency is when code can run independently of other code. Parallelism is the execution of concurrent code simultaneously. Parallelism is particularly useful when there's a lot of work to be done in userspace, an...
What's the difference between compiled and interpreted language?
...the original program is translated into something else. Another program, called "the interpreter", then examines "something else" and performs whatever actions are called for. Depending on the language and its implementation, there are a variety of forms of "something else". From more popular to...
[精华] VC中BSTR、Char和CString类型的转换 - C/C++ - 清泛网 - 专注C/C++及内核技术
...配和释放。
5．下面介绍一种比较复杂的情况，利于对问题的深入理解。例如我们现在用到的ICF底层库就有很多类似下面的函数：
void CTestDlg::GetString(BSTR* state)
{
_bstr_t m_state(L"cc");
*state = m_state.copy();
}
其中_bstr_...
分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...一台服务器来提供数据服务的时候，我会遇到如下的两个问题：1）一台服务器的性能不足以提供足够的能力服务于所有的网络...当我们在生产线上用一台服务器来提供数据服务的时候，我会遇到如下的两个问题：
1）一台服务...
SQL SELECT speed int vs varchar
...ent date types:
int fields occupy between 2 and 8 bytes, with 4 being usually more than enough ( -2147483648 to +2147483647 )
character types occupy 4 bytes plus the actual strings.
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App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
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HC05 简单介绍
基本接入代码参考
常见问题解决
Error 515: Not connected to a Bluetooth device.
Error 507: unable to connect. is the device turned on?
乱码问题排查思路
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经典蓝...
What's a good rate limiting algorithm?
...ng, you definitely do not want to use time.clock(), which measures elapsed CPU time. CPU time can run much faster or much slower than "actual" time. You want to use time.time() instead, which measures wall time ("actual" time).
– John Wiseman
Dec 21 '15 at 23...
Why does multiprocessing use only a single core after I import numpy?
...affinity on import. As far as I can tell, this problem seems to be specifically caused by them linking against multithreaded OpenBLAS libraries.
A workaround is to reset the task affinity using
os.system("taskset -p 0xff %d" % os.getpid())
With this line pasted in after the module imports, my ex...
What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++?
...ch should help beginners (and intermediate) programmers to recognize and challenge their unwarranted assumptions in C, C++ and their platforms.
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