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private final static attribute vs private final attribute
... class? Let's say for the calculator device with limited ram but plenty of CPU resources.
– Win Myo Htet
Jun 14 '13 at 21:29
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WebRTC - scalable live stream broadcasting / multicasting
...single broadcast can be relayed over unlimited users without any
bandwidth/CPU usage issues. Everything happens peer-to-peer!
This should definitely be possible to complete.
Others are also able to achieve this: http://www.streamroot.io/
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How many parameters are too many? [closed]
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A good rule-of-thumb is the number of CPU registers, because anymore and the compiler will be forced to allocate them on the stack.
– Michaelangel007
Mar 31 '16 at 14:10
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What's the purpose of the LEA instruction?
...nVoigt I used to say that, because I'm an old bloke :-) Traditionally, x86 CPUs did use the addressing units for this, agreed. But the "separation" has become very blurry these days. Some CPUs no longer have dedicated AGUs at all, others have chosen not to execute LEA on the AGUs but on the ordinary...
When should I use Lazy?
... I believe the main trade-off is between memory usage (lazy) and cpu usage (not-lazy). Because lazy has to do some extra book-keeping, InitLazy would use more memory than the other solutions. It also might have a minor performance hit on each access, while it checks whether it already has ...
How do I declare a 2d array in C++ using new?
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array[ index( x, y )]
Sad, I know. But you'll get used to it. And your CPU will thank you.
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Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int'
...t seen any difference. It will only make a difference in apps that use the CPU heavily - games for example would see a benefit compiling for 64 bit.
– Robert J. Clegg
Mar 13 '14 at 19:27
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Why can't enum's constructor access static fields?
...e problem solved via a nested class. Pros: it's shorter and also better by CPU consumption. Cons: one more class in JVM memory.
enum Day {
private static final class Helper {
static Map<String,Day> ABBR_TO_ENUM = new HashMap<>();
}
Day(String abbr) {
this.a...
Convert a String In C++ To Upper Case
...ry/cache effects: data is hot in L1 cache the whole time, and we're purely CPU-bound.
boost::to_upper_copy<char*, std::string>(): 198.0s. Yes, Boost 1.58 on Ubuntu 15.10 is really this slow. I profiled and single-stepped the asm in a debugger, and it's really, really bad: there's a dynam...
OnNotify函数 ON_NOTIFY消息总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...个窗口发的(当然可以用参数进行约定)。
如何解决这个问题？
有几种思路：1.重写ON_MESSAGE宏，增加ID的限制；2.模拟按钮单击消息；3.自定义WM_NOTIFY消息。基于这些思路都不能修改MFC底层的代码。
用调试的方式查看MFC的实现代...