On Thursday, 18 December 2014 at 22:27:06 UTC, zeljkog wrote:
On 18.12.14 14:50, Steven Schveighoffer wrote:
I wonder how your code compares to this:
void append(T)(ref T[] arr, T[] args...)
{
arr ~= args;
}
This is ~20% slower for ints, but it difference increases for
bigger structs.
What a big surprise. If you make an array of struct, each item of
your array has the length of the struct. structs a values.
If you want to append a struct to an array just append a pointer
to the struct:
----------
struct arg{uint a,r,g,h;};
arg * [] argh;
arg [] argv;
foreach(immutable i; 0..1000)
argh ~= new arg;
----------
so in argh, each item is a size_t pointer. damn.
In argv, the delta between each item is
(a.sizeof+r.sizeof+g.sizeof+h.sizeof)
In argh, the delta between each item is (arg *).sizeof
