> On Sep 12, 2017, at 12:56 PM, Sven Barth via fpc-pascal
> <fpc-pascal@lists.freepascal.org> wrote:
>
> The Inc-/DecLocked routines perform a locked increment/decrement, so they're
> blocking the memory bus for all cores (simply spoken), thus leading to a
> higher CPU utilization. On e.g. i386 there is an optimisation to only do that
> locking if IsMultiThread is True (some other platforms might benefit from
> that optimization as well :/ ).
> Additionally they are the leave routines of the dynamic array management
> code, so the time would be really used up there if not for the locking.
That’s probably it then even though I wasn’t growing the arrays by single
elements (ReAllocMem didn’t give me problems). De facto Solution is to be safe
and not use dynamic arrays in low-level high performance code.
Regards,
Ryan Joseph
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