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How do you copy the contents of an array to a std::vector in C++ without looping?
...ce() first on the two iterators to get the needed number of elements, then allocate just once.
– Drew Hall
Nov 4 '08 at 2:38
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What is a handle in C++?
... the result of a new expression is a "normal" pointer. A managed object is allocated on the GC (managed) heap with a gcnew expression. The result will be a handle. You can't do pointer arithmetic on handles. You don't free handles. The GC will take care of them. Also, the GC is free to relocate obje...
What is the difference between exit and return? [duplicate]
...ogram after the processus stopped, hence it wouldn't make much difference: allocated memory will be freed, file ressource closed and so on. But it may matter if your destructor performs IOs. For instance automatic C++ OStream locally created won't be flushed on a call to exit and you may lose some u...
Why does changing 0.1f to 0 slow down performance by 10x?
... credits to Carl Hetherington [1])
[1] http://carlh.net/plugins/denormals.php
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Union Vs Concat in Linq
... (i.e. address in memory). When you create new object via new operator, it allocates memory at new address. So, when you have four new created objects, addresses will be different. And all objects will be distinct. Thus Distinct will return all objects from sequence.
– Sergey B...
Check for column name in a SqlDataReader object
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You're enumerating the field names multiple times / allocating another array to scan with a contains, this would be much less performant in high traffic code.
– Chad Grant
Oct 4 '19 at 17:44
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private final static attribute vs private final attribute
...es, Java has no pass by reference anyways). A real useful test would be to allocate two objects and change the value of a public final int FOO = 10 variable using Java reflections in a forced way. Then check if the other object has also changed its value.
– Martijn Courteaux
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How to truncate string using SQL server
...en outputting to a text file because only the new number of characters are allocated to that column in the output text file. (e.g. 50 instead of 1000) for more compact results.
– BillDarcy
Apr 15 '15 at 20:01
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Java LinkedHashMap get first or last entry
...ent because of the few extra cycles wasted in creating array and the space allocated for the array.
– Durin
May 29 '12 at 15:13
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Does the order of LINQ functions matter?
...icantly faster.
The reduced memory pressure can be significant too, since allocations on the large object heap(together with their collection) are relatively expensive in my experience.
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