[fpc-pascal] Food for thought - language string improvement

[Florian Klaempfl]

Am 10.07.2017 um 15:00 schrieb Sven Barth via fpc-pascal:
> Am 10.07.2017 13:19 schrieb "Michael Van Canneyt"
> <michael at freepascal.org <mailto:michael at freepascal.org>>:
>>
>>
>>
>> On Mon, 10 Jul 2017, Felipe Monteiro de Carvalho wrote:
>>
>>> On Mon, Jul 10, 2017 at 1:08 PM, Michael Van Canneyt
>>> <michael at freepascal.org <mailto:michael at freepascal.org>> wrote:
>>>>
>>>> The code is definitely not the same. In each case, it was measured.
> There is
>>>> a 10% performance loss.
>>>
>>>
>>> I'd love a source on this one. I guess you mean in Free Pascal?
>>
>>
>> Obviously.
>>
>> The classes unit can be recompiled to use the fgl (well, that used to
> be so)
>> as a basis. When using the resulting list and stringlist, there was a 10%
>> performance loss. The main reason - If I recall correctly - was that
> the fgl needs to resort to move() operations instead of direct assignments.
> 
> The fgl classes don't use Move(), but they have a virtual method that
> does the assignment between the specialized parameters that's inherited
> from the non-generic parent list type.

... which is done to avoid bloat. fgl specialized only a wrapper around
an internal list. So the slightly slower code in some cases reduced
executable size.