System programming in D (Was: The God Language)

[so]

On Fri, 30 Dec 2011 20:48:54 +0200, Walter Bright  
<newshound2 at digitalmars.com> wrote:

> On 12/30/2011 7:06 AM, so wrote:
>> I agree @inline (which will probably be an extension) in D should mean
>> force-inline.
>> Ignoring the impossible-to-inline cases (which in time should get  
>> better),
>> adding @inline is a few minutes of editing.
>> It will just bypass the cost function and if it is not possible to  
>> inline, pop
>> error.
>
>
> Sure, but I think you'll be very disappointed in that it isn't going to  
> deliver the goods.

dmd_inl -O -inline test.d
dmd_inl -O -inline test_inl.d
time ./test

real    0m4.686s
user    0m3.516s
sys     0m0.007s
time ./test_inl

real    0m1.900s
user    0m1.503s
sys     0m0.007s
time ./test

real    0m4.381s
user    0m3.520s
sys     0m0.010s
time ./test_inl

real    0m1.955s
user    0m1.473s
sys     0m0.037s
time ./test

real    0m4.473s
user    0m3.506s
sys     0m0.017s
time ./test_inl

real    0m1.836s
user    0m1.507s
sys     0m0.007s
time ./test

real    0m4.627s
user    0m3.523s
sys     0m0.003s
time ./test_inl

real    0m1.984s
user    0m1.480s
sys     0m0.030s

Just bypassing cost escape, I ll try some complex cases soon after i get  
phobos working.

int test() // test.d
int test() @inline // test_inl.d
{
	int i = 0;
	++i;
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	return i;
}

void main()
{
	for(uint i=0; i<1_000_000_000; ++i)
		test();
}