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What's the Android ADB shell “dumpsys” tool and what are its benefits?
...m information in a simple string representation.
Possibility to use dumped CPU, RAM, Battery, storage stats for a
pretty charts, which will allow you to check how your application
affects the overall device!
What information can we retrieve from dumpsys shell command and how we can use it
If you ...
How to make execution pause, sleep, wait for X seconds in R?
...(x)
{
p1 <- proc.time()
Sys.sleep(x)
proc.time() - p1 # The cpu usage should be negligible
}
testit(3.7)
Yielding
> testit(3.7)
user system elapsed
0.000 0.000 3.704
share
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来自微软的一手内幕：Windows 10是怎么出炉的 - 创意 - 清泛网 - 专注C/C++及内核技术
...各种bug，他都非常耐心的在听，甚至还用邮件秒传了一个问题的解决方案给我。
他承认，干了这么多年的产品支持，自己对品质有一定偏执。很明显，他是发自内心地在乎。虽然许多人会开玩笑说，IT支持只不过是一个告诉...
What is the purpose of XORing a register with itself? [duplicate]
...it the fastest way it knows. A bit operation like XOR might take only one CPU cycle, whereas a copy (from one register to another) can take a small handful.
Often compiler writers will even have different behaviors given different target CPU architectures.
...
How many system resources will be held for keeping 1,000,000 websocket open? [closed]
...active socket connections is possible for a properly sized system (lots of CPU, RAM and fast networking) and with a tuned server system and optimized server software.
The number of connections is not the primary problem (that's mostly just a question of kernel tuning and enough memory), it is the p...
小心！创业者不可不知的互联网家装惊天伪命题 - 资讯 - 清泛网 - 专注C/C++...
...便能够实时监控到整个装修过程，对于家装过程中出现的问题，用户没有必要前往装修现场，便能够完成对整个装修过程的控制……改变正在悄然发生，虽然这些改变虽然有些机械，但是它们却正在真切地发生着。
而用户也从...
C＋＋模板的特化 - C/C++ - 清泛网 - 专注C/C++及内核技术
...至于这里怎么都把T2搞没了变成只依赖一个模板参数T了的问题，大家别着急，我来告诉你个本质的东西，把我这么三点就可以了：1.模板参数个数一致；2.只要template <...>里面有东西不是<>，比如typename T，那么特化时就得用到T；3....
What is the “volatile” keyword used for?
...with "preventing caching". It is about reordering, by the compiler, OR the CPU hardware through speculative execution.
– doug65536
Oct 7 '16 at 2:52
...
John Carmack's Unusual Fast Inverse Square Root (Quake III)
...ng result, until required accuracy is met. This is exactly how it works in CPU/FPU! But it seems that only one iteration was enough, which was also a blessing for the speed. CPU/FPU does as many iterations as needed to reach the accuracy for the floating point number in which the result is stored an...
Deep Learning（深度学习）学习笔记整理系列之（三） - 大数据 & AI - 清泛...
...算单元情况下对复杂函数的表示能力有限，针对复杂分类问题其泛化能力受到一定制约。深度学习可通过学习一种深层非线性网络结构，实现复杂函数逼近，表征输入数据分布式表示，并展现了强大的从少数样本集中学习数据集...