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javaperformanceswinggraphics2d

Java - Custom paint declaration performance

Quick yes, no, or it doesn't really matter:

I'm overriding the paint method for an abstract button and I'm wondering if doing

GradientPaint gp = new GradientPaint(0, 0, color1, 0, h, color2);
RoundRectangle2D r = new RoundRectangle2D.Float(0, 0, w, h, w/5, h/5);

and similar methods are going to affect performance vs

GradientPaint gp;
RoundRectangle2D r;

outside paint and then

gp = new GradientPaint(0, 0, color1, 0, h, color2);
r = new RoundRectangle2D.Float(0, 0, w, h, w/5, h/5);

inside the paint method

Solution

  • Go for the most maintainable solution until you measure problems :-)

    Every "optimization" requires additional logic (aka: LOC). Each additional line has a - difficult to predict - price in maintenance. My general rule it not add uncalculatable costs.

    BTW: you can't do your first option anyway, gradients are immutable - so you have to recreate each time the size has changed.