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腾讯Tencent开源框架介绍(持续更新) - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...使用者快速构建新的并发控制算法;通过验证系统提供的测试床,可以方便用户根据应用场景的需要,对目前主流的并发控制算法在相同的测试环境下进行公平的性能比较,选择一种最佳的并发控制算法。目前,验证系统已集成...
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Increasing the maximum number of TCP/IP connections in Linux

...se for the application that needs these sockets. Make sure to read post "Coping with the TCP TIME-WAIT" from Vincent Bernat to understand the implications. The net.ipv4.tcp_tw_recycle option is quite problematic for public-facing servers as it won’t handle connections from two different computers ...
https://www.tsingfun.com/it/tech/1429.html 

正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... 如何使用本教程 正则表达式到底是什么东西? 入门 测试正则表达式 元字符 字符转义 重复 字符类 分枝条件 反义 分组 后向引用 零宽断言 负向零宽断言 注释 贪婪与懒惰 处理选项 平衡组/递归匹配 还有些什么东...
https://www.tsingfun.com/it/tech/1102.html 

Java 反射最佳实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...主要是基于jOOR行编写的,如果想了解更多请查看这里的测试代码。 一、需求 今天一个“懒”程序员突然跑过来说:“反射好麻烦,我要提点需求。”听到这句话后我就知道,今天一定不好过了,奇葩需求又来了。 我们之前...
https://www.tsingfun.com/it/tech/1087.html 

Http长连接200万尝试及调优 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...核来维护这相当大的数据结构,也是一种考验。 要完成测试,我们需要有一个服务端,还有大量的客户端。所以需要服务端程序与客户端程序。为达到目标,我的想法是这样的:客户端产生一个连接,向服务端发起一个请求,...
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Why must a lambda expression be cast when supplied as a plain Delegate parameter

...w = 5; string ip = UIF<string>(() => this.GetIp(row)); bool r = GoPingIt(ip); UIA(() => this.SetPing(i, r)); Maybe a bit lazy, but i don't have to setup worker done functions, which comes in super handy in cases such as this private void Ping_DoWork(object sender, System.ComponentMod...
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Display open transactions in MySQL

...tomatic reconnection does occur (for example, as a result of calling mysql_ping()), there is no explicit indication of it. To check for reconnection, call mysql_thread_id() to get the original connection identifier before calling mysql_ping(), then call mysql_thread_id() again to see whether the ide...
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What are the security risks of setting Access-Control-Allow-Origin?

...er directly as a DDoS node. (Most routers have test pages which allow for pings or simple HTTP server checks. These can be abused en masse.) – Brad Oct 31 '16 at 0:12 ...
https://www.tsingfun.com/it/bigdata_ai/1073.html 

初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...导入了一个名为innodb_memcached_config.sql的脚本,它除了导入测试数据外,还创建了Memcached插件所需要的配置信息: mysql> USE innodb_memcache mysql> SHOW TABLES; +---------------------------+ | Tables_in_innodb_memcache | +---------------------------+ | cache...
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移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...个东西,具体的情况可以看下这篇文章。 devicePixelRatio的测试结果: 三、PPK的关于三个viewport的理论 ppk大神对于移动设备上的viewport有着非常多的研究(第一篇,第二篇,第三篇),有兴趣的同学可以去看一下,本文中有...