[plt-scheme] Statistics (V301.5 Speed Up)

I've been following this thread for a while, so here are some
benchmarks that I've been running for while now (these are current):

benchmark intepreter   mzc s-llvm interp/llvm mzc/llvm
--------- ---------- ----- ------ ----------- --------
sort1            692   643    563         1.2      1.1
nboyer          2616  1786   2115         1.2      0.8
sboyer          2090  1161    973         2.1      1.2
graphs           885  1384    712         1.2      1.9
lattice         8199 10065   3631         2.3      2.8
earley          2576  2524  11659         0.2      0.2
conform          151   179     68         2.2      2.6
dynamic         1453  1892   1105         1.3      1.7

I never get any significant variation here. The methodology is very
simple - run the benchmark once, gc a few times, run it again. I do
use time-apply. Like others have probably said, if you try to run the
program 1000 times in the same mzscheme session, the GC will be the
factor that introduces the odd distributions, not the program itself.

-- 


-Alex