[fpc-pascal] Why is cthreads unit not included by default
Jonas Maebe
jonas.maebe at elis.ugent.be
Thu Aug 27 19:38:39 CEST 2009
On 27 Aug 2009, at 19:08, Mattias Gaertner wrote:
> On Thu, 27 Aug 2009 18:57:58 +0200
> Jonas Maebe <jonas.maebe at elis.ugent.be> wrote:
>
>> Oh, now I see that the procedure was put below :) That it's quicker
>> with cmem is reasonably logical: FPC's heap manager is not very good
>> at reallocating memory.
>
> What reallocating memory do you mean?
>
> s1:=IntToStr(Paramcount+12345);
> s2:=IntToStr(Paramcount+23456);
> for i:=1 to 500000000 do begin
> s:=s1;
> s:=s2;
> end;
>
> I only change reference counters, don't I?
You're right.
>> I didn't see any timings for the command line app in your post
>> though.
>
> That was in the very first post of this thread:
Maybe on another mailing list? Not here anyway.
> Under my Linux machine the above program takes about 7.5 seconds.
> Uncomment the cthreads unit: 7.5 seconds
>
> Under OS X the above program takes on my mac book about 15 seconds.
> Uncomment the cthreads unit: 21 seconds
On my MacBook it's 12 seconds with or without cthreads (12.1 with
2.5.1, 12.8 with 2.2.4).
Jonas
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