Performance dmd vs ldc2

[Chris]

On Tuesday, 30 July 2013 at 16:43:52 UTC, John Colvin wrote:
>
> Are you sure that ldc hasn't actually just optimised away the 
> whole of parse()?
> Check to asm to be sure.

I've checked the asm output, as you suggested. Turns out that the 
DMD version has 94,220 lines and calls parse() for the first time 
on line 3278 like so:

call	  _D10xmlparser25parseFZv at PC32

The LDC version has 14,347 line and calls parse() for the first 
time on line 155 like so:

call	  _D10xmlparser25parseFZv

However, I'm no expert on asm so it's anyone's guess but mine. 
But I'm willing to learn.