Message passing between threads: Java 4 times faster than D

[Andrei Alexandrescu]

On 2/9/12 11:49 AM, Marco Leise wrote:
> Am 09.02.2012, 20:35 Uhr, schrieb Andrei Alexandrescu
> <SeeWebsiteForEmail at erdani.org>:
>
>>>> If we're doing one allocation per
>>>> message passed, that might explain the 4x performance difference (I
>>>> have no trouble figuring Java's allocator is this much faster than
>>>> D's).
>>>>
>>>>
>>>> Andrei
>>>
>>> Well, what does +1 Variant and +1 LinkedListNode sum up to?
>>
>> Sorry, I don't understand...
>>
>> Andrei
>
> There are at least 2 allocations, one for the Variant and one for the
> new node in the linked list aka message box. But from what you wrote it
> sounds like a Variant doesn't allocate unless the contained data exceeds
> some internal storage. Sean found another possible allocation in the
> other branch of this discussion.

I understand. The good news is, this looks like low-hanging fruit! I'll 
keep an eye on pull requests in druntime. Thanks to fellow Romanian 
Nicolae Mihalache for contributing the comparison.


Andrei