[fpc-pascal] Heavy heap fragmentation issue

[Marco van de Voort]

Op 6/2/2019 om 6:49 PM schreef Martok:
> I'm having a problem here in a sequential image processing application that
> seems to test a particularly bad operation mode for the RTL heap manager (on
> Windows, but I don't think this matters here).
> The work load looks like this: load "normal sized" image, do some processing,
> calculate a few values, create thumbnail in memory, next. By "normal sized" I
> mean something like 35MB uncompressed (regular DSLR resolution) and smaller.
> It's threaded code, but I'm describing the single worker operation here.

Note that it is fairly typical that also frustrated pre fastmm D7. Back 
then I wrote a simple pool-factory combo class for it, and with D2009 I 
upgraded it to generics,so that I can easily create pools for many such 
objects.

A possible issue might be that I use a simple tthreadlist for its 
storage, but since D2009 all those classes level primitives work with 
tmonitor spinlocks before them. That might be slower on FPC for high counts.