latest benchmarks

[Matthew Fluet]

Here are the results of my latest build (does not include Steve's new
basis).  Nestedloop is way up; matrix is down.  I would have expected more
improvement across the board.  I'll try extracting the hot loops from some
of them and compare.

run time ratio
benchmark         Stable MLton
barnes-hut                 1.0
checksum                   0.9
count-graphs               1.0
fft                        1.2
fib                        1.0
hamlet                     1.0
knuth-bendix               1.0
lexgen                     0.9
life                       0.8
logic                      1.1
mandelbrot                 1.0
matrix.old                 0.9
matrix.new                 0.9
matrix-multiply            1.2
md5                        1.0
merge                      1.0
mlyacc                     1.0
mpuz                       1.1
nestedloop.old             1.4
nestedloop.new             1.4
nucleic                    1.0
peek                       1.1
psdes-random               1.0
ratio-regions              1.0
ray                        1.0
raytrace                   1.1
simple                     1.0
smith-normal-form          1.0
tailfib                    1.4
tak                        0.9
tensor                     1.4
tsp                        1.0
vector-concat              1.2
vector-rev                 1.1
vliw                       1.1
wc-input1                  0.8
wc-scanStream              1.0
zebra                      0.9
zern                       1.1