c:\test>mathbcd
Comparing incrementing 100_000 digit numbers; 10,000 iterations.
            (warning: too few iterations for a reliable count)

         s/iter  magic    bcd
magic      1.66     --  -100%
bcd   6.20e-003 26740%     --
1000000000 ... 0000099999
1000000000 ... 0000099999

Comparing incrementing 1_000_000 digit numbers; 10,000 iterations
            (warning: too few iterations for a reliable count)

         s/iter   magic     bcd
magic      17.4      --   -100%
bcd   9.40e-003 185072%      --
1000000000 ... 0000099999
1000000000 ... 0000099999

Comparing incrementing 10_000_000 digit numbers; 10,000 iterations
            (warning: too few iterations for a reliable count)
** The BCD finishes in a second or so, but I gave up waiting for the 
magic to finish after it had thrashed my machine for more than an hour **