大约有 430 项符合查询结果(耗时:0.0344秒) [XML]

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How does having a dynamic variable affect performance?

... @Eric, can I trouble you to point me to a previous blog post of yours where you talk about implicit conversions of short, int, etc? As I recall you mentioned in there how/why using dynamic with Convert.ToXXX causes the compiler to fire up. ...
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内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...

...freebsd的libc malloc实现。 目前在firefox、facebook服务器各种组件中大量使用。 jemalloc原理 与tcmalloc类似,每个线程同样在<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, …, 12...
https://www.tsingfun.com/it/opensource/1235.html 

vs2008编译boost详细步骤 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...LL parser framework,用C++代码直接表达EBNF; (3)Graph,图组件和算法; (4)Lambda,在调用的地方定义短小匿名的函数对象,很实用的functional功能; (5)concept check,检查泛型编程中的concept; (6)Mpl,用模板实现的元编程框...
https://www.tsingfun.com/it/bigdata_ai/634.html 

淘宝应对双\"11\"的技术架构分析 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...数据源层实时产生的数据,通过淘宝自主研发的数据传输组件DataX、DbSync和Timetunnel准实时地传输到一个有1500个节点的Hadoop集群上,这个集群我们称之为“云梯”,是计算层的主要组成部分。在“云梯”上,我们每天有大约40000个...
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Check whether a path is valid in Python without creating a file at the path's target

... tl;dr Call the is_path_exists_or_creatable() function defined below. Strictly Python 3. That's just how we roll. A Tale of Two Questions The question of "How do I test pathname validity and, for valid pathnames, the existence or writability of those paths?" is ...
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Best architectural approaches for building iOS networking applications (REST clients)

...creative job. You should always choose the most straightforward and extensible architecture, which will be clear for any developer, who begin to work on your project or for other developers in your team, but I agree, that there can be a "good" and a "bad" architecture. You said: collect the most in...
https://www.tsingfun.com/it/cpp/1419.html 

ZeroMQ的学习和研究(PHP代码实例) - C/C++ - 清泛网 - 专注C/C++及内核技术

...是 Client 。ZMQ 可以很好的支持路由功能(实现路由功能的组件叫作 Device),把 1:N 扩展为N:M (只需要加入若干路由节点)。如图 1 所示: 图1:ZMQ 的 Request-Reply 通信 服务端的 php 程序如下: <?php /* * Hello World server * Binds R...
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一个故事告诉你比特币的原理及运作机制 - 创意 - 清泛网 - 专注C/C++及内核技术

...诉大家比特币提出的动机、解决了什么问题以及一些关键组件的目标和设计方案。 问题的提出 我们先从比特币产生的动机开始。 以物易物的比特村 话说在这个世界上,有一个叫比特村的小村庄,村庄共有几百户人家。这个...
https://www.tsingfun.com/ilife/tech/1224.html 

从Sloodle看三维虚拟学习环境的发展趋势 - 资讯 - 清泛网 - 专注C/C++及内核技术

...dle社群中有许多热心的技术人员公开分享自己创作的外挂组件。 想象一下 ,学习者利用 Moodle作为学习平台在讨论区中做课程的相关讨论 ,当他们彼此有意见需要沟通时 ,却只能以文字表达。假设 Moodle能提供一个不只有文字 ,而...
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App Inventor 2 扩展 · App Inventor 2 中文网

... Camera or LocationSensor) or services on the Web (like Twitter or FusionTables). App Inventor includes a large collection of components, and the App Inventor development team adds new capabilities to the system by implementing new components. There have been many requests to include additional f...