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Is “IF” expensive?
... work.
The current instruction to be executed is stored in something typically called the instruction pointer (IP) or program counter (PC); these terms are synonymous, but different terms are used with different architectures. For most instructions, the PC of the next instruction is just the curre...
从网购到火车票,对比淘宝12306网为何如此烂? - 大数据 & AI - 清泛网 - ...
...到让人“一票难求”的订票网站-12306。12306网站购票难的问题几乎成了所有人的共识。来自前支付宝架构师冯大辉(@Fenng)的这条微博翻出12306这笔账,别有一番滋味。
以冯大辉的计算方法,支付宝11月11日一天就处理了1亿零580万...
Beyond Stack Sampling: C++ Profilers
..., I've tried sleepy, shiny, and very sleepy, and as we speak, VTune is installing. I've tried to use the VS2008 profiler, and it's been positively punishing as well as often insensible. I've used the random pause technique. I've examined call-trees. I've fired off function traces. But the sad p...
写出高质量代码的10个Tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。
基础的数据结构与算法,掌握好这些在解决一些特定问题时,可以以更加优雅有效的方式处理。
基础的设计原则,无需完全掌握23种经典设计模式,只需要了解一些常用的设计原则即可,甚至你也可以只了解什么是低耦合,...
VC中点击任务栏让窗口最小化问题解决 - C/C++ - 清泛网 - 专注C/C++及内核技术
VC中点击任务栏让窗口最小化问题解决一个MFC对话框程序,去掉了系统自带的最小化和关闭按钮,然后自己做了自绘按钮代替其功能。现在问题是,点击任务栏的程序图标,无法让窗口...一个MFC对话框程序,去掉了系统自带的最...
What is the difference between a process and a thread?
...rating environment feature, rather than a CPU feature (though the CPU typically has operations that make threads efficient).
Erlang uses the term "process" because it does not expose a shared-memory multiprogramming model. Calling them "threads" would imply that they have shared memory.
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How is Node.js inherently faster when it still relies on Threads internally?
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There are actually a few different things being conflated here. But it starts with the meme that threads are just really hard. So if they're hard, you are more likely, when using threads to 1) break due to bugs and 2) not use them as eff...
How to return only the Date from a SQL Server DateTime datatype
...art using your method too. Thankyou @aku
– Jim Birchall
Sep 24 '08 at 8:25
38
@pilavdzice Settin...
DoModal() 不显示的问题总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
DoModal() 不显示的问题总结int nResponse = dlg.DoModal();对话框窗口不显示,返回值为-1。出现这种情况一般是.rc资源文件的问题导致。1、核对一下resource.h,本...int nResponse = dlg.DoModal();对话框窗口不显示,返回值为-1。
出现这种情况一...
支付宝回应幽灵账户:不必担心冒名贷款 - 资讯 - 清泛网 - 专注IT技能提升
...未知的“幽灵”账户,是否会造成主账户用户的资产损失问题,蚂蚁金服相关工作人员接受21世纪经济报道记者采访时称,实名认证账户下关联的子账户无法借用户身份发起蚂蚁花呗等贷款服务,并且支付宝有额外的风控手段进...
