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Mutex example / tutorial? [closed]
...le concurrently, we have potential for a race condition. Consider the following code
//somewhere long ago, we have i declared as int
void my_concurrently_called_function()
{
i++;
}
The internals of this function look so simple. It's only one statement. However, a typical pseudo-assembly languag...
Should I use tag for icons instead of ? [closed]
...t day to learn twitter's bootstrap and it feels bad that they are not following best practices.
– Jashwant
Jun 21 '12 at 9:35
25
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What are the big differences between TFVC (TFS Version Control) and Git for source control when usin
...stupid decisions on a git repository.
A very cool add-on for Git users on Windows is PoSHGit. it provides command autocompletion on the Powershell commandline.
Have you experienced in the VS 2013 GUI for Git? Is that enough to support basic branching/merging without the command line interface?
...
How do you convert a byte array to a hexadecimal string, and vice versa?
... faster than {IEnumerable}.Aggregate, for instance, but BitConverter still wins.
Update (2012-04-03)
Added Mykroft's SoapHexBinary answer to analysis, which took over third place.
Update (2013-01-15)
Added CodesInChaos's byte manipulation answer, which took over first place (by a large margin on...
What's the fastest way to merge/join data.frames in R?
... issue? For example I'm guessing that SEM=Scanning electron microscope? Knowing more about the application makes it more interesting to us and helps us prioritise.
– Matt Dowle
Aug 12 '14 at 12:00
...
C++ performance challenge: integer to std::string conversion
...--- 10.230 s
ergosys: 101.42 MB/sec --- 9.860 s
MSVC 2010 64-bit /Ox on Windows 7 64-bit, Core i5
hopman_fun: 127 MB/sec --- 7.874 s
hopman_fast: 259 MB/sec --- 3.861 s
voigt: 221.435 MB/sec --- 4.516 s
user_voigt_timo: 195.695 MB/sec --- 5.110 s
timo: 253.165 MB/sec --- 3.950 s
user: 212....
How do Mockito matchers work?
...you interact with Mockito or a mock, and has to accept matchers without knowing whether they're used immediately or abandoned accidentally. In theory, the stack should always be empty outside of a call to when or verify, but Mockito can't check that automatically.
You can check manually with Mockito...
What is private bytes, virtual bytes, working set?
I am trying to use the perfmon windows utility to debug memory leaks in a process.
4 Answers
...
How do Trigonometric functions work?
... with Chebyshev, which means faster performance)
Range reduction is a huge win. This is because the contribution of higher order polynomials shrinks down when the interval of the approximation is smaller.
If you can't get away with range reduction, your coefficients need to be stored with more preci...
Performance optimization strategies of last resort [closed]
...t's hard to sample, so I give it 10 times as much work to do, but the following times are based on the original workload.
More diagnosis reveals that it is spending time in queue-management. In-lining these reduces the time to 7 seconds.
Now a big time-taker is the diagnostic printing I had been d...