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Node.js on multi-core machines
...ents and N processes doing heavy compute tasks and chewing up the other 15 CPUs.
For scaling throughput on a webservice, you should run multiple Node.js servers on one box, one per core and split request traffic between them. This provides excellent CPU-affinity and will scale throughput nearly line...
Mod in Java produces negative numbers [duplicate]
.... I perform a lot of premature optimization. I assume it saves a couple of CPU cycles.
– Dico
Jan 9 '17 at 17:26
...
When to use AtomicReference in Java?
...system call, and your thread will block and be context switched out of the CPU to make way for other processes.
The other option is to use an AtomicRefrence.
public static AtomicReference<String> shared = new AtomicReference<>();
String init="Inital Value";
shared.set(init);
//now we w...
PHP substring extraction. Get the string before the first '/' or the whole string
... This should be the excepted answer. Definitely faster and more memory and CPU cycles efficient then any of the explode solutions given.
– Shivam Maheshwari
Jul 6 '16 at 20:04
...
MFC CListCtrl使用方法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...}
25. 在添加item后，再InsertColumn()后导致整列数据移动的问题
Q151897: CListCtrl::InsertColumn() Causes Column Data to Shift
http://support.microsoft.com/kb/151897/en-us
26. 关于listctrl第一列始终居左的问题
解决办法：把第一列当一个虚列，从第...
Is there any free OCR library for Android? [closed]
...
OCR can be pretty CPU intensive, you might want to reconsider doing it on a smart phone.
That aside, to my knowledge the popular OCR libraries are Aspire and Tesseract. Neither are straight up Java, so you're not going to get a drop-in Andro...
What are the differences between virtual memory and physical memory?
...ly, transcendentally slower. It is an I/O operation, which means it is not CPU bound (it is rather the exact opposite), which means it does not need to occupy RAM right now. However, it still occupies RAM stubbornly. If you want to launch Firefox in the meantime, you can't, because there is not much...
基于PECL OAuth打造微博应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...rOAuth改的，一旦多平台集成，很容易出现命名冲突之类的问题。
既然官方SDK不给力，那我们只能发扬自力更生的革命精神了！好消息是PHP本身已经有了一个标准的OAuth实现：PECL OAuth！下面以此为例来讲解一下：
说明：首先需...
Pointer to pointer clarification
...5678 and its buddy j with value 6 ends up just after it. Assuming a 32-bit CPU where int is 4 bytes and pointers are 4 bytes, then the variables are stored in physical memory like this:
Address Data Meaning
0x12345678 00 00 00 05 // The variable i
0x1234567C 00 00 00 06 // The...
ZeroMQ的学习和研究（PHP代码实例） - C/C++ - 清泛网 - 专注C/C++及内核技术
...订阅者，必然会丢失掉一部分信息，这是这个模式的一个问题，所谓的 Slow joiner。稍后，会解决这个问题。
d) 但是，如果 Publisher 中途离开，所有的 Subscriber 会 hold 住，等待 Publisher 再上线的时候，会继续接受信息。
ZMQ 的 PipeL...