[fpc-devel] Compiler bottlenecks]
florian at freepascal.org
Thu Jul 15 09:32:07 CEST 2010
Florian Klaempfl schrieb:
> Michael Van Canneyt schrieb:
>> On Thu, 15 Jul 2010, Florian Klaempfl wrote:
>>> Jonas Maebe schrieb:
>>>> Unless you are doing a cold compile, the main bottlenecks in the
>>>> compiler are the memory manager (mostly the allocation of memory,
>>>> freeing is faster), zero-filling new class instances (and partially
>>>> resetting the register allocator) and tobject.initinstance.
>>> I wonder if zeroing memory blocks (so when allocating them we know
>>> already that they contain zeros) and preparing new register allocators
>>> in a helper thread could improve this.
>> But if a memory block is freed and put back on the heap, you need to
>> zero it again, so where is the gain in that ?
> While it's in the freelist, the helper task
... thread ...
> zeros it so when it is
> allocated again, it needs no zeroing again.
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