...do object oriented programming, unless you build a quite complex system of allocation of objects (I thought about that. it's feasible, but insane). In practice, you can however do "Singleton oriented programming": you have one instance of each object, and only one. What I do is: i define an object ...

...too artificial, you could mentally replace int by a very large dynamically allocated integer which is inherently non thread-safe and for which multiplications are extremely costly.] The member-function area is no longer thread-safe, it is doing writes now and is not internally synchronized. Is it a ...

...) { return Optional.ofNullable(parent); }. This looks expensive because it allocates an Optional every time! But if the caller unpacks it immediately, the object is extremely short-lived and is never promoted out of eden space. It might possibly even be eliminated by the JIT's escape analysis. The b...

...ifferent between the two languages. Here, the problem is that you want to allocate some resource (open a file, obtain a database cursor, etc), perform some arbitrary operation on it, and then close it in a safe manner even if an exception occurs. In Ruby, because blocks are so easy to use (see #9)...

... However, the real problem is in step #1. When many programs start, they allocate a single chunk of memory for their stack, and when they run out of that memory (often, but not always due to recursion), the program crashes due to a stack overflow. So in these languages recursion is slower and it ...

..., a new vector is actually constructed in the copy constructor and data is allocated, but the bulk of the data array is only copied by copying the pointer (essentially). The copy elision avoids 100% of all copies. – Mark Lakata Dec 11 '14 at 1:26 ...

...utput, you should go with strings, even if it appears more than once, even allocating two different objects in memory. Here's the reasoning: Printing the symbols will be slower than printing strings because they are cast to strings. Having lots of different symbols will increase the overall mem...

...at would add overhead such as boxing, needing to pass function pointers to allocators and constructors, etc. The intention of C++ templates is to avoid having to write nearly identical class MyClass_int, class MyClass_float, etc, but to still be able to end up with compiled code that is mostly as if...

...ency of 5356 bytes regardless of optimization, by the way (with less total allocation when -O2 is used). – Ed'ka Oct 17 '10 at 10:41 1 ...

...t even managed languages provide a finally-block despite resources being deallocated automatically by the garbage collector anyway? Actually, languages based on Garbage collectors need "finally" more. A garbage collector does not destroy your objects in a timely manner, so it can not be relied upo...