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Why does my application spend 24% of its life doing a null check?

...plete a bus lock but I know they can take many times that long so if I see 3000 cycles I won't be surprised. Novice multi-threading software developers will use bus locks all over the place and then wonder why their code is slow. The trick - as with everything that has to do with memory - is to eco...
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项目管理实践【三】每日构建【Daily Build Using CruiseControl.NET and MS...

...blisher> <!--该节点用来配置合并多个文件,当时有外部插件时,要把他们分别产生的输出文件合并--> <merge> <!--要合并的文件,合并后的信息可以显示在Web Dashboard和邮件通知里--> <files> <!--...
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How do you sign a Certificate Signing Request with your Certification Authority?

...oot-ca itself you should use '-days n' option in: openssl req -x509 -days 3000 -config openssl-ca.cnf -newkey rsa:4096 -sha256 -nodes -out cacert.pem -outform PEM Failing to do so, your root-ca will be valid for only the default one month and any certificate signed by this root CA will also have ...
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Compile time string hashing

... Right -- I probably should have pointed out that I was going from N3000, which (I believe) is currently the most recent draft. I'm pretty sure it was forbidden at one time, but at least for now it seems to be allowed. – Jerry Coffin Jan 22 '10 at 5:17 ...
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Linux反编译全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...们也由一个 crackme 说开去。本文的例子程序你可以到这来下载: http://www.crackmes.de/users/veneta/crackmes/linux_crackme_v2 。古人云“工欲善其事,必先利其器”,本文中所用到的工具及操作平台罗列如下: 操作平台: gentoo 2004.3 # kernel 2.6...
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App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛,有思想、有深度

...时,数据依然存储在手机中。【参二】健身宝程序及资源下载AI伴侣最新版(广州版)健身宝(简版)(请右键选择链接另存为)健身宝(扩展版)(请右键选择链接另存为)【参三】我的车在哪儿  1、位置传感器 App Inventor为...
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iOS开发过程中的各种tips - 更多技术 - 清泛网 - 专注C/C++及内核技术

...直接在介绍AFNetworking的时候详解吧。 25.使用NSURLConnection下载数据 1. 创建对象 NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.baidu.com"]]; [NSURLConnection connectionWithRequest:request delegate:self]; 2. NSURLCon...
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MySQL复制的概述、安装、故障、技巧、工具 - 数据库(内核) - 清泛网 - 专注...

...新CHANGE MASTER TO即可,系统会抛弃当前的中继日志,重新下载: mysql> CHANGE MASTER TO MASTER_LOG_FILE='<Relay_Master_Log_File>', MASTER_LOG_POS=<Exec_Master_Log_Pos>; mysql> START SLAVE; 至于为什么使用的是Relay_Master_Log_File & Exec_Master_Log_Pos...
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30岁之后,程序员该向什么方向发展? - 杂谈 - 清泛网 - 专注C/C++及内核技术

...ools,用得人比较少。有一次我在Github上找到一个mootools的插件,很久没维护了。但是使用过程中发现一些问题,反复测试确认后,怀着忐忑的心情,我向原地址提交了commit,没想到他很快就合并了,并且向我表示感谢。当时的心...
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REDHAT 6.4 X64下ORACLE 11GR2静默安装 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

...可以不安装或在安装完 pdksh 以后再安装。 将pdksh 程序包下载到本地。 Pdksh安装包需要在网上下载光盘里没有 # rpm -ivh pdksh-5.2.14-37.el5_8.1.x86_64.rpm 注意:如果提示该程序包与 ksh冲突,如果已经安装 ksh,建议使用命令 rpm -e ksh...