大约有 226 项符合查询结果（耗时：0.0347秒） [XML]
What is the fastest integer division supporting division by zero no matter what the result is?
...ype f, @function
f:
pushl %ebp
xorl %eax, %eax
movl %esp, %ebp
movl 12(%ebp), %edx
testl %edx, %edx
sete %al
addl %edx, %eax
movl 8(%ebp), %edx
movl %eax, %ecx
popl %ebp
movl %edx, %eax
sarl $31, %edx
idivl %ec...
Performance of foreach, array_map with lambda and array_map with static function
...eed. It would be interesting to see the opcodes generated by this version, especially comparing with/without opcache since it does a lot of optimizations besides code caching.
– FGM
Jan 14 '17 at 16:04
...
C++ performance challenge: integer to std::string conversion
...
MB/s is a strange metric, especially seeing how you don't remove trailing whitespaces from the string in your implementations. My updated code runs faster than your implementation with x64 VC++ 2005 on Core i7 920 (16.2M ops/s vs. 14.8M ops/s), _ltoa ...
Difference between Covariance & Contra-variance
...ther. More specifically, a mapping can be covariant or contravariant with respect to a relation on that set.
Consider the following two subsets of the set of all C# types. First:
{ Animal,
Tiger,
Fruit,
Banana }.
And second, this clearly related set:
{ IEnumerable<Animal>,
IEn...
Declaration/definition of variables locations in ObjectiveC?
...
I can understand your confusion. Especially since recent updates to Xcode and the new LLVM compiler changed the way ivars and properties can be declared.
Before "modern" Objective-C (in "old" Obj-C 2.0) you didn't have a lot of choices. Instance variables u...
Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
... matrix (64-bit int).
The critical stride would be 2048 bytes, which correspond to 4 rows of the matrix (which is continuous in memory).
Assume we're processing row 28. We're attempting to take the elements of this row and swap them with the elements from column 28. The first 8 elements of the r...
What happens when a computer program runs?
...e most common functions are PUSH and POP to add and remove items from it, respectively. It is commonly used for function-local variables (so-called "automatic storage"), function arguments, return addresses, etc. (more below)
A "heap" is just a nickname for a chunk of memory that can be allocated ...
Why does Windows64 use a different calling convention from all other OSes on x86-64?
...ed Feb 25 '16 at 6:00
Peter CordesPeter Cordes
215k3131 gold badges354354 silver badges524524 bronze badges
...
When exactly is it leak safe to use (anonymous) inner classes?
... new definition and simply override the appropriate methods. In all other respects it is a Inner Class, which means that it keeps an implicit reference to its container.
Runnables and Activities/Views
Yay! This section can be short! Due to the fact that Runnables run outside of the current thread,...
How can I link to a specific glibc version?
...ot recommended (Drepper). You will have trouble with non-trivial programs, esp anything that uses NSS (workaround in the FAQ).
– mr.spuratic
Jul 18 '14 at 16:39
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