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Quickly create large file on a Windows system
...me less than 1 minute to generate a 1 GB file on a quad core 3.0 GHz Intel cpu. With the fsutil.exe tool as posted above, it only takes a fraction of a second to create it. So it's true, that tool creates sparse files. It's even bigger, it's 73,5 KB. This one is better for generating large files for...
技术和资本玩转创客圈 英特尔在中国的动作才刚刚开始 - 资讯 - 清泛网 - 专...
...2月的终极加速和路演，其中既有关注环保、医疗等社会问题的“智慧低碳社区”、“医院罗盘”项目，又有提升智能生活体验的“完美幻境”、“智能行车记录仪”、“图传机械臂”等智能硬件。
这些项目大多有一个特点——...
Java 反射最佳实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...哇，就一行代码啊，很爽吧~
爽完了，我们就来看看反射问题吧。因为不是系统给出的api，所以谷歌在不同的版本上用了不同的方法名来做处理，用反射的话我们就必须进行版本的判断，这是需要注意的，此外反射在性能方面确...
Where can I get a list of Ansible pre-defined variables?
...
"Pentium(R) Dual-Core CPU E5300 @ 2.60GHz"
],
"ansible_pro...
SQL Server IN vs. EXISTS Performance
...r amount of rows on each table (by fair I mean something that exceeds your CPU processing and/or ram thresholds for caching).
So the ANSWER is it DEPENDS. You can write a complex query inside IN or EXISTS, but as a rule of thumb, you should try to use IN with a limited set of distinct values and E...
How to increase heap size of an android application?
... Not directly, for your app. Having more stuff may cause you to spend more CPU time going through that stuff, but the details there would depend on what you are doing with the memory and is not directly tied to having requested android:largeHeap. However, requesting a large heap may harm the user ex...
Are static variables shared between threads?
...lem is more complex. Visibility of shared data can be affected not only by CPU caches, but also by out-of-order execution of instructions.
Therefore Java defines a Memory Model, that states under which circumstances threads can see consistent state of the shared data.
In your particular case, addi...
Write applications in C or C++ for Android? [closed]
...s list. Google envisage android running on a variety of different devices (CPUs, displays, etc). The best way to enable development is therefore to use (portable) managed code that targets the Dalvik VM. For this reason, the Android SDK doesn't support C/C++.
BUT, take a look at this page:
Andr...
Do while loop in SQL Server 2008
... live in an age where our database servers have anywhere between 10 and 20 CPU cores idle at any given moment, and where our storage controllers have their available bandwidth measured in Gigabits, so I'm not sure this conventional "wisdom" that "LOOP = BAD" still applies.
– Ge...
MongoDB: Is it possible to make a case-insensitive query?
...
Even with small datasets, it's not very efficient. You take a far bigger cpu hit than your query warrants, which could become an issue if you are trying to achieve scale.
As an alternative, you can store an uppercase copy and search against that. For instance, I have a User table that has a user...