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Quickly create a large file on a Linux system
...it take even longer? Use /dev/random instead of /dev/zero! Then you'll use CPU as well as I/O time!) In the end though, dd is a poor choice (though essentially the default used by the VM "create" GUIs). E.g:
dd if=/dev/zero of=./gentoo_root.img bs=4k iflag=fullblock,count_bytes count=10G
truncate...
Is there a way to access an iteration-counter in Java's for-each loop?
... invoke constructor, scan sooner with GC and finalize. This not only loads CPU but also invalidates the cache all the time. Nothing like this is necessary for local variables. Why do you say that this is "the same"?
– Val
Sep 1 '13 at 14:03
...
Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
...ng can be replaced with any type that ActiveRecord::Migration recognizes.
CPU is cheap so the redefinition of Task in Jim's solution isn't going to cause many problems. Especially in a production environment. This migration is proper way of doing it as it is loaded it and called much less often.
...
How can you profile a Python script?
... run:
profile euler048.py
And I get this:
1007 function calls in 0.061 CPU seconds
Ordered by: standard name
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 0.061 0.061 <string>:1(<module>)
1000 0.051 0.000 0.051 0.000 ...
Parser Error Message: Could not load type 'TestMvcApplication.MvcApplication'
...ation the project settings was wrong (Bin\Debug\x86). Changing back to Any CPU fixed the problem. But changing the output path also worked.
– Lars Udengaard
Jul 11 '13 at 12:06
13
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JMS and AMQP - RabbitMQ
... written
in many languages, and to run on multiple operating systems and CPU
architectures, which makes for a truly interoperable, cross-platform
messaging standard.
AMQP is often compared to JMS (Java Message Service), the most common
messaging system in the Java community. A limitatio...
WPF TemplateBinding vs RelativeSource TemplatedParent
...elative since the binding operation takes very little of the application's cpu. If you were blasting control templates around at high speed you might notice it.
As a matter of practice use the TemplateBinding when you can but don't fear the Binding.
...
Why extend the Android Application class?
... limited? just passing the data objects instead of serializing them saves cpu and memory. parceling stuff for inside-process-on-same-device handovers is not ideal in any way. I really don't see the point of intentservice use like that(just do the other thread with new). really a lot of the stuff t...
关于php的socket初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...程来处理的 IO 模型，但是效率相对比较差，也很容易出问题，所以暂时不做介绍了）。在这些多路复用的模式中，异步阻塞/非阻塞模式的扩展性和性能最好。
引入阻塞/非阻塞,、同步/异步比喻很形象的一段话：
有A，B，C，D...
What does threadsafe mean?
...ntee can potentially be limited to certain environments such as a specific CPU architecture, but must hold for those environments. If there is no explicit delimitation of environments, then it is usually taken to imply that it holds for all environments that the code can be compiled and executed.
T...