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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...
What is the best algorithm for overriding GetHashCode?
... just wrap
{
int hash = 17;
// Suitable nullity checks etc, of course :)
hash = hash * 23 + field1.GetHashCode();
hash = hash * 23 + field2.GetHashCode();
hash = hash * 23 + field3.GetHashCode();
return hash;
}
}
As noted in comments, you may...
Benchmarking small code samples in C#, can this implementation be improved?
...ty to minimize fluctuations caused by other processes/threads
Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.High;
Thread.CurrentThread.Priority = ThreadPriority.Highest;
// warm up
func();
var watch = new Stopwatch();
// clean up
GC.Collect();
...
Which is faster in Python: x**.5 or math.sqrt(x)?
... Took 0.157436 seconds Took 0.093905 seconds Target system: Ubuntu Linux CPU: Intel(R) Core(TM)2 Duo CPU T9600 @ 2.80GHz As you can see I got different results. According to this your answer is not generic.
– zoli2k
Apr 23 '10 at 3:37
...
Java NIO FileChannel versus FileOutputstream performance / usefulness
...ly benchmarking the disk, and not Java. I would also suggest that if your CPU is not busy, then you are probably experiencing some other bottleneck.
Don't use a buffer if you don't need to.
Why copy to memory if your target is another disk or a NIC? With larger files, the latency incured is non-...
How is Python's List Implemented?
...size;
/* Vector of pointers to list elements. list[0] is ob_item[0], etc. */
PyObject **ob_item;
/* ob_item contains space for 'allocated' elements. The number
* currently in use is ob_size.
* Invariants:
* 0 <= ob_size <= allocated
* len(list) == ob...
2015互联网结束补贴战 从相杀到相爱只需一个长假 - 资讯 - 清泛网 - 专注C/...
...
逐利合并结束补贴战
滴滴和快的合并后，外界最关心的问题是以后用手机叫车还有补贴吗？
在2015年第一财季，58同城净亏损5240万美元。而滴滴和快的之间的补贴烧钱大战也是愈演愈烈。“有一天，我们甚至烧掉了1000万美元...
GestureDetect 手势检测扩展：识别滑动、点击和长按手势 · App Inventor 2 中文网
...势检测原理
性能优化建议
常见问题
Q: 手势检测不灵敏怎么办？
Q: 手势在按钮上不起作用？
Q: 可以在滚动排列中使用吗？
Q: 如何在同一个组件上检测多种手势？
...
WebRTC - scalable live stream broadcasting / multicasting
...s connect, they connect to Janus, again: WebRTC negotiation, secured keys, etc. From now on, Janus will emit back the streams to each attendees.
This works well because the broadcaster (B) only uploads its stream once, to Janus. Now Janus decodes the data using its own key and have access to the ...
In what situations would AJAX long/short polling be preferred over HTML5 WebSockets?
...m the fact that you would need to setup websocket on the server (handlers, etc.) There is simply no reason to use Long polling over websocket. Websocket is much faster (low latency) and allows the server to "talk" to the client without the client asking it to. Nowadays I use signalr (one of the best...