effects of chunk coalescing

[Stephen Weeks]

Here are the smlc numbers.

smlc		203,904,043	231,583,783	115,364,096
(no coalesce)	432,212,115	231,563,936	209,014,695

> Here are the trampoline counts for the benchmarks with and without
> random chunk coalescing.
> 
> These numbers are probably a bit misleading, because the small size of
> the benchmarks makes it more likely for coalescing to work well.
> 
> 		trampolines	returns		inter-chunk returns
> 		----------	------------	-------------------
> barnes-hut	 1,482,484	21,175,411	  741,241
> (no coalesce)	17,888,474	21,175,411	8,236,031
> 
> count-graphs	     1,102	20,948,776	       650
> (no coalesce)	38,448,104	20,948,776	13,553,376
> 
> fft		20,974,184	10,487,242	10,487,091
> (no coalesce)	20,974,486	10,487,242	10,487,242
> 
> knuth-bendix	 11,116,052	20,883,251	 5,865,100
> (no coalesce)	118,440,554	20,883,251	57,741,301
> 
> lexgen		 16,958,142	111,061,245	10,826,810
> (no coalesce)	200,709,318	111,061,245	99,916,628
> 
> life			2	5,789,414		 0
> (no coalesce)	8,973,846	5,789,414	 4,619,132
> 
> logic		116,370,472	136,706,110	19,473,700
> (no coalesce)	214,818,022	136,706,110	78,772,610
> 
> mandelbrot	2		0		0
> (no coalesce)	2		0		0
> 
> matrix-multiply	 2		20		 0
> (no coalesce)	42		20		20
> 
> mlyacc		19,839,376	50,907,041	 9,902,515
> (no coalesce)	49,642,390	50,907,041	24,147,102
> 
> nucleic			 2	25,871,000		 0
> (no coalesce)	51,750,602	25,871,000	25,658,800
> 
> ratio-regions	 5,183,525	35,835,339	 3,118,291
> (no coalesce)	71,670,697	35,835,339	35,835,339
> 
> simple		 61,011,165	81,662,139	30,604,657
> (no coalesce)	105,476,240	81,662,139	52,401,889
> 
> tsp			62	12,802,173		60
> (no coalesce)	23,645,978	12,802,173	11,826,813
> 
> vliw		50,817,713	34,952,200	26,002,984
> (no coalesce)	63,566,347	34,952,200	31,558,885
> 
> zern		2		3		0
> (no coalesce)	8		3		3