Slow performance compared to C++, ideas?

[Andrei Alexandrescu]

On 6/6/13 4:30 PM, Jonathan M Davis wrote:
> On Thursday, June 06, 2013 15:56:24 Andrei Alexandrescu wrote:
>> On 6/6/13 3:37 PM, Walter Bright wrote:
>>> On 6/6/2013 12:31 PM, Andrei Alexandrescu wrote:
>>>> I think class hierarchy analysis is very doable for whole D projects.
>>>> You just
>>>> pass the tool all files in the project and it does its thing.
>>>>
>>>> http://www.cs.ucla.edu/~palsberg/tba/papers/dean-grove-chambers-ecoop95.p
>>>> df
>>>>
>>>>
>>>> This would actually be a great GSoC-style project, distributable via
>>>> tools/.
>>>
>>> The trouble, as has been pointed out before, is shared libraries.
>>
>> I wrote:
>>
>> "I think class hierarchy analysis is very doable for whole D projects."
>>
>> Whole. Projects.
>>
>> WHOLE PROJECTS.
>>
>> WHOLE. PROJECTS.
>>
>> Worked on by Top. Men.
>
> LOL. Yes, well. That's certainly much closer, but if the shared library
> changes and later derives more types than it did before. And since shared
> libraries can be swapped out, that could break the optimizations that the tool
> did, so you'd have to run the tool over the whole thing again. So, it's
> definitely an idea with potential, but I don't think that it could be
> guaranteed to work in all cases, and the programmer likely have to be aware of
> when it didn't work in order to avoid some nasty bugs.

There would be no bugs, worst case compilation errors. (The tool I'm 
envisioning would add final annotations or prompt the user to add them.)

Andrei