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Create numpy matrix filled with NaNs
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[ 42, 42]])
But the @u0b34a0f6ae's accepted answer is 3x faster (CPU cycles, not brain cycles to remember numpy syntax ;):
$ python -mtimeit "import numpy as np; X = np.empty((100,100));" "X[:] = np.nan;"
100000 loops, best of 3: 8.9 usec per loop
(predict)laneh@predict:~/src/predict/pred...
控件重绘函数/消息OnPaint,OnDraw,OnDrawItem,DrawItem的区别 - C/C++ - 清...
...时对控件的绘制，上面介绍的差不多了，还有一个CView的问题，也就是OnPaint和Ondraw的关系，其实这个很简单，CView::OnPaint()的源码如下：
void CView::OnPaint()
{
CPaintDC dc(this);
OnPrepareDC(&dc);
OnDraw(&dc)
}
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“The breakpoint will not currently be hit. The source code is different from the original version.”
...r x86 in that dialog, while my local machine is x64! So I selected the Any CPU option and it works again.
– JP Hellemons
Jul 11 '12 at 7:28
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Where does the iPhone Simulator store its data?
...pp in the simulator
Open Activity Monitor
Find the name of your app in the CPU tab
Double-click it and open the "Open Files and Ports"
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Converting from Integer, to BigInteger
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Making strings to perform integer math wastes more CPU cycles than you would care to count.
– jbindel
Jan 31 '18 at 16:02
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How to do ssh with a timeout in a script?
...dified on the remote server. This means that if you are running a runaway CPU-intensive job on the remote server, you will leak processes.
– James Davis
Feb 5 '18 at 15:08
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How do I get the localhost name in PowerShell?
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A slight tweak on @CPU-100's answer, for the local FQDN:
[System.Net.DNS]::GetHostByName($Null).HostName
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list.clear() vs list = new ArrayList(); [duplicate]
...me of the list will be in both versions, and
your heap / GC parameters and CPU.
These make it hard to predict which will be better. But my intuition is that the difference will not be that great.
Two bits of advice on optimization:
Don't waste time trying to optimize this ... unless the applic...
What does it mean when MySQL is in the state “Sending data”?
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And what if MySQL is "sending data" while using 99% CPU, with very little disk I/O?
– rustyx
Apr 19 '17 at 20:25
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Quick Sort Vs Merge Sort [duplicate]
...ps in Quick sort are lesser than Merge sort. Swap operation is costlier on CPU than compare operation, as mentioned here. Testing on home laptop Quick sort takes 0.6 sec to sort millon items unlike merge sort taking 1 sec where as insertion sort takes 2.8 hours.
– overexchange
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