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Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...譬如Paint的实例化操作不要写在onDraw()方法中等）；
对于并发下载等类似逻辑的实现尽量避免多次创建线程对象，而是交给线程池处理。
当然了，有了上面说明GC导致的性能后我们就该定位分析问题了，可以通过运行DDMS->Alloca...
STL or Qt containers?
...mplementation across operating systems. A STL implementation must obey the C++ standard, but
is otherwise free to do as it pleases (see the std::string COW controversy). Some STL implementations are especially
bad.
provide hashes, which are not available unless you use TR1
The QTL has a different ...
Implements vs extends: When to use? What's the difference?
... the class that "implements" the interface can implement the methods. The C++ equivalent of an interface would be an abstract class (not EXACTLY the same but pretty much).
Also java doesn't support multiple inheritance for classes. This is solved by using multiple interfaces.
public interface Exam...
What's the rationale for null terminated strings?
As much as I love C and C++, I can't help but scratch my head at the choice of null terminated strings:
18 Answers
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Order of member constructor and destructor calls
Oh C++ gurus, I seek thy wisdom. Speak standardese to me and tell my if C++ guarantees that the following program:
4 Answer...
Windows 7, 64 bit, DLL problems
I have a problem with our executable. I'm running this C++ 32-bit executable on my Windows 7 64-bit development box that also has all those Microsoft applications (Visual Studio 2008 + 2010, TFS, SDK, Microsoft Office)...
And it's still running just fine.
...
How to do parallel programming in Python?
For C++, we can use OpenMP to do parallel programming; however, OpenMP will not work for Python. What should I do if I want to parallel some parts of my python program?
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#ifdef in C#
I would like to do the below but in C# instead of C++
3 Answers
3
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How to automatically convert strongly typed enum into int?
...That's another weird example of 'we know better what you want to do' from C++ creators. Conventional (old-style) enums had tons of benefits like implicit conversion to indexes, seamless using of bitwise operations etc.. The new style enums added a really great scoping thing, but... You cannot use j...
Is local static variable initialization thread-safe in C++11? [duplicate]
...n gcc:
Do not emit the extra code to use the routines specified in the C++ ABI for thread-safe initialization of local statics. You can use this option to reduce code size slightly in code that doesn't need to be thread-safe.
Also, have a look at the old thread Are function static variables t...