Official compiler

[H. S. Teoh via Digitalmars-d]

On Thu, Feb 25, 2016 at 02:03:47PM -0800, Walter Bright via Digitalmars-d wrote:
> On 2/25/2016 1:50 PM, Andrei Alexandrescu wrote:
> >Good to know, thanks! -- Andrei
> 
> DMD did slow down because it was now being compiled by DMD instead of
> g++.  Also, dmd was doing multithreaded file I/O, but that was removed
> because speed didn't matter <grrrr>.
[...]

I remember you did a bunch of stuff to the optimizer after the
switchover to self-hosting; how much of a difference did that make? Are
there any low-hanging fruit left that could make dmd faster?

On a related note, I discovered an O(n^2) algorithm in the front-end...
it's unlikely to be an actual bottleneck in practice (basically it's
quadratic in the number of fields in an aggregate), though you never
know. It actually does a full n^2 iterations, and seemed like it could
be at least pared down to n(n+1)/2, even without doing better than
O(n^2).


T

-- 
What is Matter, what is Mind? Never Mind, it doesn't Matter.