> Just wondering, for a caption that doesn't change very oftern which in
> more efficient.
>
> StateLabel.caption := 'Running';
>
> OR
>
> IF StateLabel.Caption <> 'Running' then
> StateLabel.Caption := 'Running';
There are 2 sides to this...
1. The cost of the assignment versus the cost of the test
String comparison are as far as comparisons go, pretty computationally heavy
but on case-sensitive short string-lengths it is still likely that the cost of
side-effects
like redrawing the screen are more expensive than the comparison itself - Generally
it's nice to test first (however see 2)...
2. The implementation of .Caption...
.Caption is a property of your control, it is likely that the internal storage of
this property
is implemented in a SetCaption procedure like
procedure TTheComponent.SetCaption(const Value :String);
begin
if Value<>FCaption then begin
FCaption := Value;
CaptionChanged;
end;
end;
This allows side-effects like redraws and such... But note it protects against
subsequent
'Change' events being triggered if the newcaption matches the old caption...
IMHO with todays memory-scales your mind should always be on functionality, stability
and performance not minor byte-trimming with the source-code... Selection of the right
algorithm for the job should be enough...
--
Aaron@home
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