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C# DateTime.Now precision
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Why would DateTime.Now be made less precise than what most CPU clocks could handle?
A good clock should be both precise and accurate; those are different. As the old joke goes, a stopped clock is exactly accurate twice a day, a clock a minute slow is never accurate at any time. Bu...
Should I Stop Stopwatch at the end of the method?
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Also a Stopwatch isn't doing any work or eating cpu clock cycles between the calls to Start() and Stop(). Start() just sets a timestamp to now and Stop() calculates and saves the time elapsed since that. See source in coreclr: github.com/dotnet/corefx/blob/master/src/…
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How do you calculate log base 2 in Java for integers?
...lace a few static math functions with alternative implementations based on CPU intrinsics. One of those functions is Integer.numberOfLeadingZeros(). So with a 1.7 or newer server VM, a implementation like the one in the question is actually slightly faster than the binlog above. Unfortunatly the cli...
Thread vs ThreadPool
...than the main thread pool. If one has a lot of tasks to perform which are CPU intensive but won't block, it may be helpful to dispatch them using a pool of application threads (one per CPU core) which is separate from the "main" threadpool, since using more threads than cores will be counterprod
Java's Virtual Machine and CLR
... VM's, with no notion of "registers" like we're used to seeing in a modern CPU like the x86 or PowerPC. The evaluation of all expressions ((1 + 1) / 2) is performed by pushing operands onto the "stack" and then popping those operands off the stack whenever an instruction (add, divide, etc) needs to ...
HTML 5 tag vs Flash video. What are the pros and cons?
...d unlikely ever will be (as a result of its being proprietary and its high CPU consumption).
HTML 5: Could it kill Flash and Silverlight? is an article that might answer your question.
There are probably more reasons out there.
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How to read a large file - line by line?
...htop to see that with plain old sequential pandas dataframe.read_csv, 100% cpu on just one core is the actual bottleneck in pd.read_csv, not the disk at all.
I should add I'm using an SSD on fast video card bus, not a spinning HD on SATA6 bus, plus 16 CPU cores.
Also, another technique that I disc...
Why doesn't C++ have a garbage collector?
... responsiveness or server loading?
should it use lots of memory or lots of CPU?
C/c++ is used in just too many different circumstances.
I suspect something like boost smart pointers will be enough for most users
Edit - Automatic garbage collectors aren't so much a problem of performance (you can a...
初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...务器不仅浪费了内存,而且还必须自己维护数据的不一致问题,有了Memcached插件,这些问题都不存在了,而且借助MySQL本身的复制功能,我们可以说是变相的实现了Memcached的复制,这更是意外之喜。
安装
为了让文章更具完整性...
盘点微软历史上9大失败软件产品! - 创意 - 清泛网 - 专注C/C++及内核技术
...面。希望满足初级计算机用户的需求,或许这个概念没有问题,但是过于简单,只是讲解如何使用计算机,售价却高达100美元,结果在没有市场的情况下被淘汰了。有趣的是,Bob项目是由盖茨的老婆梅林达负责管理的。
2、MSN Me...
