Hi,

 From the preamble:

This enhancement was contributed by Dan Ingalls, I have just packaged it  
up as an enhancement and confirmed it passes all exising tests.

It replaces the implementation of DateAndTime>>dayOfYear to speed it up by  
a factor of 80.

All 394 test cases in the Kernel-Chronology Tests category succeed in a  
3.9a-6531 image.

	now := DateAndTime now.
	[ 10000 timesRepeat: [ now dayOfYear] ] timeToRun

	Results:		2694 milliseconds with old code, 33 milliseconds with new code.

It should be imcluded in 3.9 soonest.

Thanks

Brent
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