True
      86,843,064 bytes allocated in the heap
      86,411,376 bytes copied during GC
      16,705,880 bytes maximum residency (6 sample(s))
      21,094,104 bytes maximum slop
              15 MB total memory in use (0 MB lost due to fragmentation)

                                     Tot time (elapsed)  Avg pause  Max pause
  Gen  0        41 colls,    41 par    0.185s   0.046s     0.0011s    0.0057s
  Gen  1         6 colls,     5 par    0.231s   0.070s     0.0117s    0.0275s

  Parallel GC work balance: 16.18% (serial 0%, perfect 100%)

  TASKS: 14 (1 bound, 13 peak workers (13 total), using -N6)

  SPARKS: 112683 (111772 converted, 0 overflowed, 0 dud, 888 GC'd, 23 fizzled)

  INIT    time    0.002s  (  0.013s elapsed)
  MUT     time   25.978s  (  4.615s elapsed)
  GC      time    0.416s  (  0.116s elapsed)
  EXIT    time    0.015s  (  0.011s elapsed)
  Total   time   26.411s  (  4.756s elapsed)

  Alloc rate    3,342,972 bytes per MUT second

  Productivity  98.4% of total user, 97.0% of total elapsed

word-search-exe inputs/large_input_500.txt 500 500 "haskell" +RTS -N6 -s -ls  26.79s user 0.32s system 555% cpu 4.883 total