True
      80,363,912 bytes allocated in the heap
      61,939,432 bytes copied during GC
      13,754,520 bytes maximum residency (4 sample(s))
         155,496 bytes maximum slop
              13 MB total memory in use (0 MB lost due to fragmentation)

                                     Tot time (elapsed)  Avg pause  Max pause
  Gen  0        72 colls,     0 par    0.046s   0.049s     0.0007s    0.0039s
  Gen  1         4 colls,     0 par    0.019s   0.027s     0.0068s    0.0125s

  TASKS: 4 (1 bound, 3 peak workers (3 total), using -N1)

  SPARKS: 112683 (3 converted, 0 overflowed, 0 dud, 90465 GC'd, 22215 fizzled)

  INIT    time    0.001s  (  0.025s elapsed)
  MUT     time   17.642s  ( 17.728s elapsed)
  GC      time    0.064s  (  0.076s elapsed)
  EXIT    time    0.001s  (  0.002s elapsed)
  Total   time   17.708s  ( 17.832s elapsed)

  Alloc rate    4,555,271 bytes per MUT second

  Productivity  99.6% of total user, 99.4% of total elapsed

word-search-exe inputs/large_input_500.txt 500 500 "haskell" +RTS -N1 -s -ls  17.71s user 0.26s system 98% cpu 18.265 total
