Study: build times for D programs

[Joseph Rushton Wakeling]

On 27/07/12 07:29, Iain Buclaw wrote:
> -inline is mapped to -finline-functions in GDC.  Inlining is possibly
> done, but only in the backend.
>
> Some extra notes to bear in mind about GDC.
> 1) All methods and function literals are marked as 'inline' by default.
> 2) Cross module inlining does not occur if you are compiling one-at-a-time.

Good to know.  In this case it's all compiled together in one go:

###############################################
DC = gdmd
DFLAGS = -O -release -inline
DREGSRC = dregs/core.d dregs/codetermine.d

all: test

test: test.d $(DREGSRC)
       $(DC) $(DFLAGS) -of$@ $^

.PHONY: clean

clean:
       rm -f test *.o
###############################################

I'm just surprised that using -inline produces no measurable difference at all 
in performance for GDC, whether or not any other optimization flags are used. 
As I said, maybe I'll test some manual inlining and see what difference it might 
make ...