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How do I choose grid and block dimensions for CUDA kernels?
... size can impact performance and suggest a common heuristic for its choice based on occupancy maximization. Without wanting to provide the criterion to choose the block size, it would be worth mentioning that CUDA 6.5 (now in Release Candidate version) includes several new runtime functions to aid i...
Difference between decimal, float and double in .NET?
...thing that makes 0.1 "better" than 0.10000001 is because human beings like base 10. And even with a float value, if you initialize two values with 0.1 the same way, they will both be the same value. It's just that that value won't be exactly 0.1 -- it will be the closest value to 0.1 that can be e...
Fastest way to iterate over all the chars in a String
...et the entire buffer (at least on Android), but your indexing will be zero based. However, if you know that you don't have a substring, it will work fine.
– prewett
Apr 26 '14 at 16:54
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Difference between map, applymap and apply methods in Pandas
...Footnotes
map when passed a dictionary/Series will map elements based on the keys in that dictionary/Series. Missing values will be recorded as
NaN in the output.
applymap in more recent versions has been optimised for some operations. You will find applymap slightly faster than apply...
How do I register a DLL file on Windows 7 64-bit?
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Well, you don't specify if it's a 32 or 64 bit dll and you don't include the error message, but I'll guess that it's the same issue as described in this KB article: Error Message When You Run Regsvr32.exe on 64-Bit Windows
Quote from that article:
This behavio...
Determining 32 vs 64 bit in C++
...or a way to reliably determine whether C++ code is being compiled in 32 vs 64 bit. We've come up with what we think is a reasonable solution using macros, but was curious to know if people could think of cases where this might fail or if there is a better way to do this. Please note we are trying to...
Failed to load the JNI shared Library (JDK)
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You need a 64-bit trio:
64-bit OS
64-bit Java
64-bit Eclipse
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Call Go functions from C
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Efficient way to determine number of digits in an integer
...eger, would be a lookup. Should be faster than the much shorter logarithm based approach. If you don't care about counting the '-', remove the + 1.
// generic solution
template <class T>
int numDigits(T number)
{
int digits = 0;
if (number < 0) digits = 1; // remove this line if ...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
... a very weird effect: Changing the loop variable from unsigned to uint64_t made the performance drop by 50% on my PC.
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