4,537,111,528 bytes allocated in the heap 966,337,104 bytes copied during GC (scavenged) 9,500,416 bytes copied during GC (not scavenged) 7,516,160 bytes maximum residency (53 sample(s)) 4286 collections in generation 0 ( 6.88s) 53 collections in generation 1 ( 0.55s) 19 Mb total memory in use Task 0 (worker) : MUT time: 0.00s ( 0.00s elapsed) GC time: 0.00s ( 0.00s elapsed) Task 1 (worker) : MUT time: 0.00s ( 0.00s elapsed) GC time: 0.00s ( 0.00s elapsed) Task 2 (worker) : MUT time: 0.07s ( 70.90s elapsed) GC time: 0.00s ( 0.01s elapsed) Task 3 (worker) : MUT time: 0.05s ( 70.91s elapsed) GC time: 0.00s ( 0.00s elapsed) Task 4 (worker) : MUT time: 40.76s ( 70.91s elapsed) GC time: 3.94s ( 3.89s elapsed) Task 5 (worker) : MUT time: 41.12s ( 70.91s elapsed) GC time: 3.49s ( 3.40s elapsed) Task 6 (worker) : MUT time: 0.07s ( 70.91s elapsed) GC time: 0.00s ( 0.00s elapsed) Task 7 (worker) : MUT time: 0.00s ( 70.91s elapsed) GC time: 0.00s ( 0.00s elapsed) INIT time 0.00s ( 0.00s elapsed) MUT time 35.82s ( 70.91s elapsed) GC time 7.43s ( 7.30s elapsed) EXIT time 0.00s ( 0.00s elapsed) Total time 43.25s ( 78.21s elapsed) %GC time 17.2% (9.3% elapsed) Alloc rate 126,664,196 bytes per MUT second Productivity 82.8% of total user, 45.8% of total elapsed ./nuke +RTS -N2 -sstderr -RTS 43.25s user 47.14s system 115% cpu 1:18.22 total