Color a row - QSqlRelationalTableModel or QSqlQueryModel

[anda_skoa]

When the compiler sees == on a string, at the same time that we are evaluating the other values, what is all that happens ? and how expensive is that compared to for example the other suggestion where it is using the .isEmpty() ?? What is happening inside isEmpty() ?? is it more expensive or is there something to gain ?

isEmpty() is almost certainly faster since the expected value is either a null string or a non-empty string.
But that was one of my original points, wasn't it?

In any case it really doesn't matter, only actually measured timing data does.

The only thing that is always true is that things that are not executed are "faster" than things that are executed, so doing things that aren't necessary is always going to be more time consuming than not doing it in the first place.
Which of course is also one of the initially pointed out issues.

Cheers,
_

[AKG]

The reason I was repeating this question, was to explain to the other poster jefftee what my question were actually about.

I'm sorry that it sounded like i did not already get it, because you did point it out very well already, and I really appreciate your comment i previous posts. You already explained it very well, and I really appreciate your previous answers. Sorry for the repeated question. That was intended for the other poster to make him understand what my question was before. But it is already answered, you are absolutely correct about that.

Thank you /