[Mono-devel-list] System.Web/System.Web.UI - patch (code synchronization between Mono and Mainsoft)

[Ilya Kharmatsky]

Hi, All!

Rafael's guess is correct. Since Java doesn't support structs at all - 
we are forced to
use classes instead of all ValueTypes.  In case of struct array 
initialization - our converter
(which converts MSIL => Java bytecode) generates "hidden" helper functions
which initialize each element of array before first usage of such array.

Ilya.



Rafael Teixeira wrote:

>I maybe due to the fact that Java, doesn't have value objects other
>than the basic crowd (int, long, double, float...), and to be able to
>have the value semantics GH has to create lots of
>imuttable/cloneable/value-comparable objects...
>
>Just guessing...
>
>On 6/9/05, Ben Maurer <bmaurer at ximian.com> wrote:
>  
>
>>On Thu, 2005-06-09 at 19:05 -0400, Gonzalo Paniagua Javier wrote:
>>    
>>
>>>On Wed, 2005-06-08 at 14:11 +0300, Ilya Kharmatsky wrote:
>>>      
>>>
>>>>Please review the patch.
>>>>
>>>>BTW, in HtmlTextWriter.cs we changed internal structs (e.g.
>>>>RenderStyle) to be the classes
>>>> and not structs - this in order to resolve heavy performance problem
>>>>in our implementation
>>>> of initialization of arrays of structs. May be the better idea is to
>>>>change also original mono
>>>> code - since in this case we can avoid additional "splitting" of code
>>>>between standard and
>>>> J2EE configuration. I think impact of this won't be too high - from
>>>>perspective of memory
>>>> consumption and performance.
>>>>        
>>>>
>>>RenderAttribute, TagInformation and RenderStyle might be ok as classes.
>>>As you say, this is no big deal. Feel free to make those classes if
>>>nothing breaks.
>>>      
>>>
>>What exactly do you guys do when initing an array of structs that is so
>>slow?
>>
>>In this case, chances are, performance won't suffer that much. It does
>>make our GC do more work than it needs to (and it is already pretty
>>heavy on stuff).
>>
>>However, there are cases where using arrays of structs will give us a
>>large benefit in C#. So it would make sense to figure out what is
>>happening, rather than to shove it under the rug.
>>
>>-- Ben
>>
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>>
>>    
>>
>
>
>  
>
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