Bill Baxter wrote:
On Sun, Nov 23, 2008 at 3:25 PM, Jarrett Billingsley
<[EMAIL PROTECTED]> wrote:
On Sat, Nov 22, 2008 at 11:40 PM, Sam S E <[EMAIL PROTECTED]> wrote:
Does foreach use delegates? Isn't that unnecessary overhead?
--Sam
It does use delegates, for iterating over most types. When iterating
over arrays, the compiler turns it into a sort of for loop instead.
Is it unnecessary overhead? It's not always as fast as it could be,
but unless someone can figure out some other way of implementing it,
it's pretty much the best we can get.
How about iterator objects, like in C++ or Java? Are they unnecessary
overhead? ;)
How does delegate overhead compare to the stack thread context switch
overhead in the new Fibers in druntime?
--bb
~32 instructions per switch and 4KB allocated for fibers, versus about 2
instructions and no allocation for delegates.
