reggae v0.5.0: new features in the D meta-build system

[Jacob Carlborg via Digitalmars-d-announce]

On 2015-09-26 01:53, anonymous wrote:

> Compiling one file at a time is yet another thing.
>
> 1) Compile everything into one object file:
> dmd -c -ofresult.o foo.d bar.d
> 2) Compile to multiple object files in one run:
> dmd -c foo.d bar.d
> 3) Compile to multiple object files in multiple runs:
> dmd -c foo.d; dmd -c bar.d
>
> Since you didn't know about 2, I take it that you measured 1 vs 3. 3 is
> bound to be slower when the modules share dependencies, because they have to
> be parsed again and again.
>
> 2 may be faster or slower than 1, I don't know, a quick check didn't show a
> difference. When the template instantiation issue ever gets fixed, I
> wouldn't be surprised if 2 got slower than 1. Of course, any slowness of 2
> must then be weighed against 1 compiling more than necessary.

In theory 2 should be faster when it comes to recompiling because fewer 
files need to be recompiled.

-- 
/Jacob Carlborg