dmd 2.068, 2.069, 2.0xx Evil Plan going forward

[Walter Bright via Digitalmars-d]

On 7/21/2015 4:31 AM, Martin Nowak wrote:
> Talking about compiler speed, we can get an easy 10% speedup using PGO+LTO.
> https://github.com/D-Programming-Language/dmd/pull/4651

The PR needs to be updated.