[Python-Dev] collections module

[Jeff Epler]

Here are the parrotbench results, using the "user" field from "make
time" output.  There's a clear speedup of nearly 1 second in the
-listopt version.  During parts of these tests my system was also running
nice'd distcc jobs, but since user time was measured this shouldn't
matter much.  "real" times were slower for python-listopt (0.56 seconds
difference of median values) and more scattered (1.52 std dev vs 0.32
std dev) for this reason.

        Python-cvs  Python-listopt
        18.32       18.39
        18.44       18.39
        18.83       17.53
        18.75       17.38
        18.63       17.37
        18.91       17.36
        18.55       17.63
        18.66       18.06
        18.68       17.38
        18.74       17.92
            
Minimum 18.32       17.36
Maximum 18.91       18.39
Median  18.67       17.58
Average 18.65       17.74
Std.Dev  0.18        0.42
T-test   0.00%      =ttest(b2:b11; c2:c11; 2; 3)
Difference of median values
        -0.91