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

Sven Barth pascaldragon at googlemail.com
Mon Jul 10 15:00:17 CEST 2017

Am 10.07.2017 13:19 schrieb "Michael Van Canneyt" <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> 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
> 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.

You might want to test with the list provided by the rtl-generics package.

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