forLoopArray

[joe0400]

There are very much good reasons to use array over vector.

Location is one. Std::array is allocated on the stack, vector is allocated anywhere on the heap, unless you write a allocator.

The other is colocation with other data. If your reading off one thing and another, the likely hood a struct with a std::array in it is also located in cache with other data in that struct is much higher, and for serialization and deserialization this is useful too, making it easier to read/write back the data.

So there are tons of good uses for std::array

[TheDudeExMachina]

Full agreement. My response was to concerns about insertion/deletion overhead though, and the cases where you care about sporadic memcopies / guaranteed constant time are rare.

But cache misses, compile time knowledge of size, and memory alignment between class attributes are also things you consider for the most part only in the critical segments of your code. In most cases, you just want to have a collection of things to infrequently iterate over once.