[m-dev.] benchmarks for fixed size trail versus trail segments

[Julien Fischer]

Hi,

Here are some timings for the trail segment change.

Julien.

----------------

hlc.gc.tr vs. hlc.gc.trseg for the G12 FD benchmarks.

The fixed size trail is 65,536 kilowords -- it needs to that
big in order to avoid trail exhaustion ;-)

The segment size is 32 kilowords.

Test                Fixed size        Segments
----                ----------        ---------- 
alpha                   710 ms            500 ms
bridge                  500 ms            370 ms
cars                    560 ms            350 ms
contig_bench           1210 ms           1070 ms
test_element           1000 ms            900 ms
test_element            570 ms            400 ms
eq10                    670 ms            470 ms
eq20                    670 ms            470 ms
queens                  780 ms            620 ms
queens_ff   250         720 ms            790 ms 
sendmoney               260 ms             50 ms
sudoku                  480 ms            450 ms
steiner 2,3,7           270 ms             50 ms
steiner 2,3,15          580 ms            400 ms
steiner 2,3,31         7450 ms           7820 ms
steiner 2,4,13         7670 ms           7750 ms
steiner 2,5,21          520 ms            310 ms
steiner 3,4,8          6930 ms           7930 ms
steiner 3,4,16         7220 ms           7630 ms
steiner 3,6,22         4190 ms           4450 ms
queens_ff 500          2270 ms           3000 ms
steiner 2,3,9         79590 ms          81350 ms
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