Self-compile on rabbit and snake

[Stephen Weeks]

Here is a comparison of the running times of three generations (G0,
G1, G2) of a polyvariant self-compile on both rabbit and snake.  For
G1 and G2, I also give the GC%.  G1 and G2 both used a 950m heap.  As
you can see, there was no improvement on rabbit in going from G0 to
G1, but there was a big (expected) improvement on snake.  That is, we
expected G1 (and G2, which should be identical to G1) to run about
twice as fast as G0.  The only explanation I see for the numbers is
that the non-speedup is due to the memory card in rabbit.

	rabbit		snake
G0(s)	1147.99		2003.99

G1(s)	1104.06		 919.82
%GC	20.9%		17.9%

G2(s)	1108.09		 915.34
%GC	21.0%		18%

Here are some other (machine invariant) statistics about the run.

code size(bytes): 16,141,623

stack size(bytes): 16,777,216
max semispace size(bytes): 471,859,200
number of GCs: 43
bytes allocated: 8,797,345,976
bytes copied: 2,090,201,096
max live(bytes): 111,347,692