L505 wrote:
L wrote:
Why is the first and third example *so* much faster than the second example?
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
slower.
Weird.
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
concatenation.
It's only two characters in length (#13#10) whereas the Line is much bigger.
The first string is always long, so you are doing twice adding a small
string to a long string. This causes much heap fragmentation.
Try result:= result + (Line + #13#10);
or
Line := Line + #13#10;
Result := Result + Line;
OTOH using a TStringList is probably faster, because strings are only
concatenated once.
Vicnent.
_______________________________________________
fpc-pascal maillist - fpc-pascal@lists.freepascal.org
http://lists.freepascal.org/mailman/listinfo/fpc-pascal
