[cp-patches] FYI: JComponent optimization

[Roman Kennke]

Hi,

I optimized one of the hot spots in Swing a little. The paintChildren
method used to call Component.getBounds(), which always allocates a new
Rectangle objects. I replaced this by Component.getBounds(Rectangle) and
made it reuse a static transient Rectangle field. This works quite well
and should reduce Rectangle allocations significantly.

2005-10-10  David Gilbert  <address@hidden>

        * javax/swing/JComponent.java
        (rectCache): New field. Caches Rectangle objects for reuse.
        (paintChildren): Changed to reuse cached Rectangle object.

/Roman

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