In log4j, commons-logging, etc. a common pattern is
if (isDebugEnabled()) {
// some expensive string building to put message together
log.debug(expensiveMessage);
}
The point is that without the isXXXEnabled(), the expensive string
building must occur even if the most verbose logger activated is not
verbose enough to cause the log message to be written.
I don't see such functionality in Ant and yet it seems to me like an
obviously useful extension. Has there been discussion before about this
and a conscious decision not to do it?
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