[fpc-devel] Comparison FPC 2.6.2 - Delphi 7

[Florian Klämpfl]

Am 02.03.2013 11:28, schrieb Michael Van Canneyt:
> 
> 
> On Sat, 2 Mar 2013, Martin Schreiber wrote:
> 
>> On Saturday 02 March 2013 10:52:18 Michael Van Canneyt wrote:
>>>
>>> Anyway, what seems obvious from your numbers is that it is the linking
>>> stage that needs speedup. This does not really come as a surprise.
>>>
>> On Windows FPC linking time of MSEide is about 2-3 seconds IIRC, I'll
>> check it
>> later, currently I try to make MSEide+MSEgui Kylix3 compatible so we
>> have a
>> benchmark on Linux too.
> 
> When you do, please send me the output of a strace -f
> 
> It will allow me to see what IO the Delphi/Kylix compiler does.
> 
> We can say for sure that the fact you use .pas as filename extension
> will cause FPC to do twice the number of stat() calls, because .pp is
> searched first...Logical therefore that the IO is slower.
> 
> (for example renaming all files to .pp takes off +/- 1 second here)
> 
> Nevertheless, I'd be interested in seeing the strace.

Better parallize the building using some build units. Then it will be
probably compiled in less than 10 sec on a modern CPU.