Generated binary size

[Dicebot]

On Friday, 13 September 2013 at 12:51:13 UTC, Johannes Pfau wrote:
> It seems like the gdc compiled program has more symbols for some
> reason:
>
> ----------
> nm hello-dmd --defined-only | wc -l
> 3834
> nm hello-gdc --defined-only | wc -l
> 5451
> ----------
>
> Here's a "diff" of the defined symbols:
> https://gist.github.com/jpf91/6550247

Yep and `--gc-sections` gets it down to:

```
$ nm hello-gdc --defined-only | wc -l
3894
```

I was curious though what kind of code gen optimization dmd uses 
here (as opposed to gdc) as simple experiments show that it does 
not remove unused template instances.