data pulverizer wrote:
I have noticed that some numerical packages written in D use pointer semantics heavily (not referring to packages that link to C libraries). I am in the process of writing code for a numerical computing library and would like to know whether there times when addressing an array using pointers conveys performance benefits over using D's array or functional semantics?
using `arr.ptr[n]` instead of `arr[n]` bypasses bounds checking. this may be diserable in tight loops (while disabling bounds checking globally is not).
but note that `foreach (int n; arr)` doesn't do bounds checking in loop too (afair), so you prolly better use `foreach` instead of pointers. this way your code will be fast, but still safe.
