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内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...程同样在<32KB的时候无锁使用线程本地cache。
Jemalloc在64bits系统上使用下面的size-class分类：
Small: [8], [16, 32, 48, …, 128], [192, 256, 320, …, 512], [768, 1024, 1280, …, 3840]
Large: [4 KiB, 8 KiB, 12 KiB, …, 4072 KiB]
Huge: [4 MiB, 8 MiB, 12 MiB, …]
smal...
OnNotify函数 ON_NOTIFY消息总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...用的一种在你的MFC应用程序中处理WM_NOTIFY消息的方法。
Windows 3.x 的 通告消息
在Windows 3.x下，控件通过发送一个消息给它的父窗口来告知诸如目标点击，内容的变化与选中，控件北京绘制等等之类的事件。简单的通告消息以特...
Is there a standard sign function (signum, sgn) in C/C++?
...ranchless code, but they'll do it also for ternaries or if/else if it is a win.
– Patrick Schlüter
Mar 12 '12 at 15:41
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show 17 more comme...
Use of #pragma in C
.... As per jalfs comments, data that is aligned on a 4 byte boundary for 32 bit processors or 8 byte boundary for 64 bit processors will typically be loaded and stored in a single operation. Data that is aligned on smaller boundaries will take multiple operations to load or store. This is slower.
...
GridLayout (not GridView) how to stretch all children evenly
...ails.
END UPDATE
There are limitations when using the GridLayout, the following quote is taken from the documentation.
"GridLayout does not provide support for the principle of weight, as
defined in weight. In general, it is not therefore possible to
configure a GridLayout to distribute exce...
UnicodeDecodeError: 'utf8' codec can't decode byte 0xa5 in position 0: invalid start byte
...
Since UTF-8 is back-compatible with the oldschool 7-bit ASCII you should just encode everything. For characters in the 7-bit ASCII range this encoding will be an identity mapping.
– Tadeusz A. Kadłubowski
Mar 6 '14 at 7:47
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微软正式推送Win10，不满意或者不习惯可以回滚至旧版 - 资讯 - 清泛网 - 专...
微软正式推送Win10，不满意或者不习惯可以回滚至旧版今天无疑是微软新款操作系统Win10的大日子，被视作继Win7之后又一个能够带微软重回巅峰的系统作品，Win10推送全面开启，Win7、Win8用户从今日零点起就可以免费升级到Win10，...
How to print the ld(linker) search path
...
100
You can do this by executing the following command:
ld --verbose | grep SEARCH_DIR | tr -s ' ...
converting a base 64 string to an image and saving it
...ystem.Drawing DLL
– Philip Rego
Jan 10 '17 at 18:34
1
@Bibin did you try saving the image inside ...
Groovy Shell warning “Could not open/create prefs root node …”
...ennis answer is correct. However I would like to explain the solution in a bit more detailed way (for Windows User):
Go into your Start Menu and type regedit into the search field.
Navigate to path HKEY_LOCAL_MACHINE\Software\JavaSoft (Windows 10 seems to now have this here: HKEY_LOCAL_MACHINE\Sof...