DMD compilation speed

[Andrea Fontana via Digitalmars-d]

On Thursday, 11 February 2016 at 08:46:19 UTC, Ola Fosheim 
Grøstad wrote:
> On Thursday, 11 February 2016 at 08:37:29 UTC, Andrea Fontana 
> wrote:
>> Check this:
>> http://digger.k3.1azy.net/trend/
>
> Cool, why did the peak heap size during compilation drop from 
> approx. 180MB to 30MB?

Zooming on graph you can see that the improvement was due to this:
https://github.com/D-Programming-Language/dmd/pull/4923