Odd performance difference

[H. S. Teoh]

Since compiling every source file I have in a single command causes GDC
to ICE, I decided to experiment with compiling the files in batches.
Turns out I can do it in two batches without crashing GDC:

	gdc ${first_seven_files} -o a.o
	gdc ${second_six_files} -o b.o
	gdc a.o b.o -o program

Here's the odd thing. The resulting program is much smaller than if I
compiled every .d file separately, about 30% smaller. But the smaller
program consistently runs about 3x slower than the larger one. Why is
that?


T

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