everest% CC -DNDEBUG array.C isort.C twmergesort.C t-merge.C -o t-merge
array.C:
isort.C:
twmergesort.C:
t-merge.C:
everest% 


everest% time t-merge 1280000 1123
33.7u 0.3s 2:24 23% 0+0k 0+0io 0pf+0w
everest%