hello world executable size

[Vladimir Panteleev via Digitalmars-d]

On Sunday, 28 June 2015 at 10:06:20 UTC, Joakim wrote:
> On Sunday, 28 June 2015 at 09:55:53 UTC, Vladimir Panteleev 
> wrote:
>> On Sunday, 28 June 2015 at 09:46:45 UTC, rsw0x wrote:
>>> looks like this commit more than doubled the size of hello 
>>> world
>>>
>>> https://github.com/D-Programming-Language/phobos/pull/3443
>>
>> Woah. Why would removing an import increase the filesize?
>
> I didn't get that either, maybe he meant the PR that yours 
> fixed is the one that doubled it?

No, he's right. Removing the import doubled the filesize of a 
helloworld binary.

> On Sunday, 28 June 2015 at 09:58:35 UTC, Vladimir Panteleev 
> wrote:
>> On Sunday, 28 June 2015 at 09:27:56 UTC, Joakim wrote:
>>> Another check that would be more worthwhile but harder to 
>>> measure would be speed of compilation of druntime/phobos, 
>>> especially since speed of compilation is considered a key 
>>> selling point of D.  Harder to measure because it depends on 
>>> what else is going on on that machine, but with some care and 
>>> enough samples, you could get something representative.
>>
>> Compilation/linking time are measured for the sample programs.
>
> Yeah, I saw that, but I was talking about adding a github check 
> for D PRs and how they affect compilation speed, especially for 
> dmd PRs.  Druntime/Phobos and eventually ddmd may not be the 
> best way to check it, but it's the closest lamppost. ;)
>
> Smaller binary size is nice to have, but not that important, 
> especially since we've been neglecting it for some time now.
>
> Compilation speed is something we're always trumpeting, we 
> better track it.

It's not really possible to meaningfully track such an inaccurate 
statistic on a per-commit basis. See it yourself - select one of 
the time tests in AWSY and zoom in. It works in aggregate - when 
zoomed out, you see the medians and can get the general big 
picture. But when comparing any two commits directly, there is 
just too much error.