[Unknown]

            loggingMessage = true;                
            for (int i = 0; i < listeners.size(); i++) {
                BuildListener listener = (BuildListener) listeners.elementAt(i);

To this:

            loggingMessage = true;                
            int size = listeners.size();
            for (int i = 0; i < size; i++) {
                BuildListener listener = (BuildListener) listeners.elementAt(i);


It's not a huge speedup (about 15%) but it makes a difference.

I'm using Ant 1.5.3-1 (compiled from source, obviously) on a 1ghz Powerbook
running OS X 10.2.5 and JDK 1.4.1. My build doesn't have any custom build
listeners, just the default.

If this fix can't be implemented for some reason, please leave this bug open -
IMHO this is a defect that needs to be fixed.