[fpc-pascal] Speed question for strings
peter at freepascal.org
Sat Nov 19 09:47:30 CET 2005
At 09:46 19-11-2005, you wrote:
> > L wrote:
> > > Why is the first and third example *so* much faster than the second
> > > Significantly faster.
> > >
> > Because you doubled the number of string concatenations.
> > Vincent.
>Right, but it's not twice as slow :-) Worse... It's at least 50-100 times
>I will have to do some bench marks. I just thought that if there was
>already a string
>concatenation happening, that an additional concatenation would cost me
>twice as much
>time, but not 50-100 times. Plus, the second concatenation is a small
>It's only two characters in length (#13#10) whereas the Line is much bigger.
Use a good profiler like valgrind/kcachegrind to see where the most time is
spend. Also from your code it is not clear what kind of strings are used.
There is a huge difference between shortstring and ansistrings regarding
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