On Monday, 11 February 2013 at 16:51:22 UTC, Steven Schveighoffer
wrote:
On Mon, 11 Feb 2013 10:08:52 -0500, deadalnix
<deadal...@gmail.com> wrote:
A good rule of thumb to know when to pass by ref for perf is :
- The struct is big, or contains mixed entities (floats and
ints). 2*size_t seems like a good heuristic from my experience.
Array slices are 2*sizeof(size_t). I would expect them to be
always copied and not ref'd.
First, they alway appears to be copied from the dev perspective.
That why I put bunch of restrictions in the proposal.
Second, slice are 2*size_t and are not mixed entities (from CPU
perspective, pointer are integers). So I don't have numbers, but
I expect slice to be faster when passed by copy than when passed
by ref.
