[fpc-pascal] Re: TLinkedList

[michael.vancanneyt at wisa.be]

On Wed, 15 Feb 2012, Sven Barth wrote:

> Am 14.02.2012 22:28, schrieb Marco van de Voort:
>> In our previous episode, Sven Barth said:
>>>> Afaik it was the main reason to implement generic constraints in Delphi 
>>>> (like
>>>> .NET)?
>>> 
>>> Constraints allow the compiler to infer further information on the given
>>> types to improve e.g. type checking when parsing the generic,
>> 
>> Exactly. You e.g. know that the unspecialized generic is already meant for
>> reference types, from line one.
>> 
>>> but they won't magically allow the compiler to not duplicate code (in
>>> theory it would be possible to do something like Java's generics for cases
>>> where the constraints are for descendants of TObject or IInterface, but in
>>> my opinion the tradeoffs (increased compiler complexity) are not worth
>>> it).
>> 
>> Yeah, that is typical. If it is not used inside the compiler it is
>> unoptimized :-)
>> 
>> Maybe redo cclasses with generics?
>
> That wouldn't change that much... the performance of specialized generics 
> isn't that different from "normal" code.

I tested that. It's about 10% slower.

Michael.