大约有 5,229 项符合查询结果（耗时：0.0212秒） [XML]
Get file version in PowerShell
... C:\Windows\regedit.exe
6.1.7600.16385 6.1.7600.1638... C:\Windows\splwow64.exe
1,7,0,0 1,7,0,0 C:\Windows\twunk_16.exe
1,7,1,0 1,7,1,0 C:\Windows\twunk_32.exe
6.1.7600.16385 6.1.7600.1638... C:\Windows\winhlp32.exe
6.1.7600.16385 6.1.7600.1638... C:\Windows...
Interface defining a constructor signature?
...
@user1721649: There are plenty of places where I've wanted this - almost always with generic constraints. Basically, you want to be able to call a constructor within a generic method, to create an instance of the generic type implemen...
Replace None with NaN in pandas dataframe
... NB: this method uses np.nan, which has a float dtype (e.g.: float64), as opposed to pandas's default dtype of object for a nan column.
– tehfink
Jun 20 '18 at 11:37
4
...
Why does Java have transient fields?
...
64
Your 'simple sentence' is merely a tautology. It explains nothing. You'd be better off without it.
– Marquis of Lorne...
What is “overhead”?
...the programmer's own code. For example compilation of some code for 32 or 64 bit processors might entail greater overhead than one would see for an old 8-bit or 16-bit architecture. This might involve larger memory overhead (alignment issues) or CPU overhead (where the CPU is forced to adjust bit ...
Why is MATLAB so fast in matrix multiplication?
...gt;> gputimeit(@()gA*gA)
ans =
0.0022
Update using R2018b on a WIN64 machine with 16 physical cores and a Tesla V100:
>> timeit(@()A*A)
ans =
0.0229
>> gputimeit(@()gA*gA)
ans =
4.8019e-04
(NB: at some point (I forget when exactly) gpuArray switched from MAGMA to cuBLA...
Reading large text files with streams in C#
...as targeting .NET 3.x on a 32-bit platform. Today, targeting .NET 4.5 on a 64-bit platform, I do not see any improvement.
Related
I came across a case where streaming a large, generated CSV file to the Response stream from an ASP.Net MVC action was very slow. Adding a BufferedStream improved perf...
Generator Expressions vs. List Comprehension
...1
dF.dF.
64.2k2727 gold badges123123 silver badges134134 bronze badges
...
Python Sets vs Lists
...tup="from __main__ import in_test4", number=100000))
Output:
tuple
4.735646052286029
list
4.7308746771886945
set
3.5755991376936436
or
4.687681658193469
For 3 to 5 literals, set still wins by a wide margin, and or becomes the slowest.
In Python 2, set is always the slowest. or is the fastest f...
What generates the “text file busy” message in Unix?
...e workaround:
gcc -g -Wall -o rmk1 main.o -L. -lrmk -L/Users/jleffler/lib/64 -ljl
if [ -f rmk ] ; then mv rmk rmk2 ; else true; fi ; mv rmk1 rmk
So, to avoid problems with the 'text file busy', the build created a new file rmk1, then moved the old rmk to rmk2 (rename wasn't a problem; unlink was)...