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Linux C++程序内存占用过高的原因分析 - C/C++ - 清泛网 - 专注C/C++及内核技术

...为0的话,考虑可能是内存碎片过多导致的,这种情况下可以考虑使用 jemalloc,使用preload方式载入 jemalloc,接替系统的内存分配函数,可极大消除内存碎片问题。 valgrind 内存泄漏 jemalloc
https://www.tsingfun.com/it/cpp/1460.html 

控件重绘函数/消息OnPaint,OnDraw,OnDrawItem,DrawItem的区别 - C/C++ - 清...

...自画,你就必须重载CListBox的DrawItem方法和MeasureItem方法才可以,但象菜单,按钮等的自画则会调用OnDrawItem。 OnPaint和OnDrawItem不在一个范畴内,他是WM_PAINT的响应函数,凡是基于CWnd的类都有OnPaint事件发生,就是说凡是窗口都有WM...
https://www.tsingfun.com/it/opensource/452.html 

开源邮件传输代理软件 -- Postfix 介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...性能上大约比sendmail快三倍。一部运行postfix的台式PC每天可以收发上百万封邮件。 3. 兼容性好: postfix是sendmail兼容的,从而使sendmail用户可以很方便地迁移到postfix。Postfix支持/var[/spool]/mail、/etc/aliases、 NIS、和 ~/.forward 文件。 ...
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Main differences between SOAP and RESTful web services in Java [duplicate]

...describing Web services and how to access them. It will run on SMTP, HTTP, FTP, etc. It requires middleware support and well-defined mechanism to define services like WSDL+XSD and WS-Policy. SOAP will return XML based data REST Representational State Transfer (RESTful) web services. They are seco...
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How to get error information when HttpWebRequest.GetResponse() fails

... I came across this question when trying to check if a file existed on an FTP site or not. If the file doesn't exist there will be an error when trying to check its timestamp. But I want to make sure the error is not something else, by checking its type. The Response property on WebException will ...
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笨法玩电商网站秒杀 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...因素直线下降,在这种场景下,单纯的关闭死锁检测虽然可以提升一定的性能,但这顶多是治标而已,如何治本?淘宝给出来两个改进方法: 请求排队:如果请求一股脑的涌入数据库,势必会由于争抢资源造成性能下降,通...
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How to check for a valid URL in Java?

...you can set to control how this class behaves, by default http, https, and ftp are accepted. share | improve this answer | follow | ...
https://www.tsingfun.com/it/cpp/1435.html 

std::find,std::find_if使用小结 - C/C++ - 清泛网 - 专注C/C++及内核技术

...元素是一个类/结构体呢? 来个稍复杂点的例子,其他的可以类推,实现功能如下: 产品、账号多对多的关系,通过产品找到对应的账号列表。 #include <vector> #include <algorithm> #include <string> using namespace std; typedef struct _Pro...
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XunSearch(讯搜)的使用教程步骤 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...Linux和Unix下运行。官方发布了一个DEMO 直接下载 PHP-SDK 就可以开发测试。 XunSearch 讯搜 教程 php c c++
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AppInventor2使用 MaterialIcons 图标字体,快捷展示专业图标 - App应用开...

...只需要填入图标的英文代码即可,每种图标的英文代码,可以访问这里进行搜索查看:https://fonts.google.com/icons?icon.set=Material+Icons