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Android emulator and virtualbox cannot run at same time
... @rudolfbyker, what the answer says is that emulators that run with CPU/ABI x86/x86_64 is a lot faster, but uses the same KVM (Kernel-based Virtual Machine) as VitualBox. Creating an emulator with another CPU, like arm64, will not conflict with VirtualBox, but emulator is a lot slower.
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Do sealed classes really offer performance Benefits?
...iler implementation and execution environment.
Details
Many of modern CPUs use long pipeline structure to increase performance. Because CPU is incredibly faster than memory, CPU has to prefetch code from memory to accelerate pipeline. If the code is not ready at proper time, the pipelines will ...
SQL SELECT speed int vs varchar
...... obviously non-float are smaller than strings and floats, and thus more CPU friendly in assembly.
String to string comparison in all languages is slower than something that can be compared in 1 instruction by the CPU. Even comparing 8 byte (64bit) on a 32bit CPU is still faster than a VARCHAR(2)...
SQL Server Management Studio, how to get execution time down to milliseconds
...hing like this in your Messages window:
SQL Server Execution Times: CPU time = 6 ms, elapsed time = 6 ms.
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MFC中主窗口和子窗口的菜单问题，如何统一显示MDI主窗体菜单？ - C/C++ - ...
MFC中主窗口和子窗口的菜单问题，如何统一显示MDI主窗体菜单？在 MDI 应用程序中，每一个子窗体的菜单都显示在 MDI 窗体上，而不是在子窗体本身。当子窗体有焦点时，该子窗体的菜单（如果有的话）就...
在 MDI 应用程序...
MFC采用双缓存解决闪屏问题(使用了双缓存还是闪屏的) - C/C++ - 清泛网 - ...
MFC采用双缓存解决闪屏问题(使用了双缓存还是闪屏的)1.为什么出现闪屏？xxxxx2.没有效果？BEGIN_MESSAGE_MAP(Cxxxx, CStatic) ON_WM_ERASEBKGND()END_MESSAGE_MAP()BOOL Cxxxx::OnErase...1.为什么出现闪屏？
xxxxx
2.没有效果？
BEGIN_MESSAGE_MAP(Cxxxx, CSt...
解决MFC使用ShowWindow(SW_MAXIMIZE)任务栏被遮住的问题 - C/C++ - 清泛网 ...
解决MFC使用ShowWindow(SW_MAXIMIZE)任务栏被遮住的问题重载OnGetMinMaxInfo消息处理函数解决，代码如下：BEGIN_MESSAGE_MAP(CxxxDlg, CDialogEx)...ON_WM_GETMINMAXINFO()END_MESSAGE_MAP()...a...重载OnGetMinMaxInfo消息处理函数解决，代码如下：
BEGIN_MESSAGE_MAP(Cx...
__declspec(dllexport) 导出符号解决链接失败问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
__declspec(dllexport) 导出符号解决链接失败问题特别注意：dllexport、dllimport导出、导入的方式仅针对dll动态库，而lib静态库无需任何申明，宏全部替换成空即可。error LNK2019: 无法解析的外部符号 "public: __thiscall CBtt::CBtt(void)" (??0CBtt@@Q...
解决Eclipse CDT Dark主题Editor bgcolor设置无效被覆盖的问题 - C/C++ - ...
解决Eclipse CDT Dark主题Editor bgcolor设置无效被覆盖的问题Eclipse CDT切换Dark黑色主题后，自定义设置代码区背景颜色后发现背景色永远都是 2f2f2f，用户设置的颜色无效，Google了以下发现，代码区的颜色是写死在eclipse主题的css里面的...
Mac升级10.14版本，深度休眠后VNC登陆界面卡住的问题 - 操作系统(内核) - ...
Mac升级10.14版本，深度休眠后VNC登陆界面卡住的问题ssh登陆mac机器，查看login相关进程：ps -elf | grep login一般有4个进程，除了logind及console，其他2个进程使用sudo kill -9杀掉，即可恢复正常登陆。ssh登陆mac机器，查看login相关进程：
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