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


everest% time t-merge 1280000 1123
37.3u 0.3s 2:32 24% 0+0k 0+0io 0pf+0w
everest%