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Multiprocessing - Pipe vs Queue
...the default) and timeout is None (the default), block if necessary until a free slot is available. If timeout is a positive number, it blocks at most timeout seconds and raises the queue.Full exception if no free slot was available within that time." Are you sure about your answer?
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Why doesn't C++ have a garbage collector?
...weep is faster (less impact on overall performance) but it suffers from a "freeze the world" syndrome: i.e. when the GC kicks in, everything else is stopped until the GC has made its cleanup. If you wish to build a server that answers in a few milliseconds... some transactions will not live up to yo...
INNER JOIN vs LEFT JOIN performance in SQL Server
...not been discussed yet.
When using an outer join, the optimizer is always free to drop the outer joined table from the execution plan if the join columns are the PK of the outer table, and none of the outer table columns are referenced outside of the outer join itself. For example SELECT A.* FROM A...
Shared-memory objects in multiprocessing
... utility class to work around it.
I'm using multiprocessing.RawArray (lockfree), and also the access to the arrays is not synchronized at all (lockfree), be careful not to shoot your own feet.
With the solution I get speedups by a factor of approx 3 on a quad-core i7.
Here's the code:
Feel free t...
C++ - passing references to std::shared_ptr or boost::shared_ptr
...o an existing shared_ptr.
The downside is that copied a shared_ptr is not free: even "lock-free" implementations have to use an interlocked operation to honour threading guarantees. So there may be situations where a program can be significantly sped up by changing a shared_ptr into a shared_ptr &a...
Interfaces vs. abstract classes [duplicate]
...led
Ability to provide behavior related or unrelated to the interface for "free"
Interfaces are merely data passing contracts and do not have these features. However, they are typically more flexible as a type can only be derived from one class, but can implement any number of interfaces.
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TextEnhancer拓展 - 增强App中的文本格式 - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
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[size=15.008px]https://community.appinventor.mit.edu/t/free-textenhancer-enhance-text-formatting-in-your-app/111213
When to use actors instead of messaging solutions such as WebSphere MQ or Tibco Rendezvous?
...buted akka here and not akka the actor library. That's how I read it. Feel free to edit my post as your point is valid and could confuse others that stumble on the post.
– Adam Gent
Mar 6 '15 at 11:33
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Learning assembly [closed]
... any platform worth using has data sheets or programmers reference manuals free from the vendor that include the instruction set as well as the encoding of the opcodes (the bits and bytes of the machine language). For the purpose of learning what the compiler does and how to write code that compile...
Is std::vector so much slower than plain arrays?
...t said, simply changing the malloc to new Pixel[dimensions*dimensions] and free to delete [] pixels does not make much difference with the simple implementation of Pixel that you have. Here's the results on my box (E6600, 64-bit):
UseArray completed in 0.269 seconds
UseVector completed in 1.665 sec...