when when rollup dies with cache:
{ rss: 154533888, heapTotal: 125739008, heapUsed: 91440776 },
{ rss: 373751808, heapTotal: 345399296, heapUsed: 241697880 },
{ rss: 392359936, heapTotal: 365342720, heapUsed: 317458824 },
{ rss: 593084416, heapTotal: 563167232, heapUsed: 510649792 },
{ rss: 790614016, heapTotal: 759365632, heapUsed: 708062936 },
{ rss: 668528640, heapTotal: 634781696, heapUsed: 455590688 },
{ rss: 743395328, heapTotal: 706199552, heapUsed: 634803784 },
{ rss: 925995008, heapTotal: 887717888, heapUsed: 819709376 },
{ rss: 790409216, heapTotal: 749375488, heapUsed: 545969800 },
{ rss: 852434944, heapTotal: 811356160, heapUsed: 717778024 },
{ rss: 852668416, heapTotal: 820195328, heapUsed: 607674264 },
{ rss: 921796608, heapTotal: 885321728, heapUsed: 793049704 },
{ rss: 894246912, heapTotal: 862412800, heapUsed: 676285576 },
{ rss: 981889024, heapTotal: 947462144, heapUsed: 860901296 },
{ rss: 914411520, heapTotal: 878542848, heapUsed: 667935032 },
{ rss: 987860992, heapTotal: 951009280, heapUsed: 854855720 },
{ rss: 1184952320, heapTotal: 1147207680, heapUsed: 1049529176 },
{ rss: 1065058304, heapTotal: 1027956736, heapUsed: 893399056 },
{ rss: 1231638528, heapTotal: 1194795008, heapUsed: 1089856904 },
{ rss: 1180729344, heapTotal: 1145200640, heapUsed: 966446224 },
{ rss: 1302364160, heapTotal: 1264852992, heapUsed: 1153592192 },
{ rss: 1233899520, heapTotal: 1196097536, heapUsed: 1032700800 },
{ rss: 1371021312, heapTotal: 1333575680, heapUsed: 1216271968 },
{ rss: 1270620160, heapTotal: 1234862080, heapUsed: 1114768504 },
{ rss: 1369378816, heapTotal: 1332711424, heapUsed: 1112061072 },
{ rss: 1462530048, heapTotal: 1425100800, heapUsed: 1298018248 },
{ rss: 1386369024, heapTotal: 1350549504, heapUsed: 1222958712 },
{ rss: 1438605312, heapTotal: 1401569280, heapUsed: 1202099936 },
{ rss: 1444921344, heapTotal: 1407094784, heapUsed: 1249565144 },
{ rss: 1484754944, heapTotal: 1447776256, heapUsed: 1299312760 },
{ rss: 1448554496, heapTotal: 1411547136, heapUsed: 1221658024 },
{ rss: 1452781568, heapTotal: 1414868992, heapUsed: 1256999352 },
{ rss: 1497608192, heapTotal: 1460498432, heapUsed: 1309417768 },
when rollup doesn't die without cache:
{ rss: 153034752, heapTotal: 126787584, heapUsed: 90867872 }
{ rss: 325095424, heapTotal: 299114496, heapUsed: 255929400 }
{ rss: 401289216, heapTotal: 365342720, heapUsed: 317087320 }
{ rss: 746065920, heapTotal: 704241664, heapUsed: 571045264 }
{ rss: 1026019328, heapTotal: 984788992, heapUsed: 685069744 }
{ rss: 1191346176, heapTotal: 1147301888, heapUsed: 897143496 }
{ rss: 1323302912, heapTotal: 1278795776, heapUsed: 1143467856 }
{ rss: 1522814976, heapTotal: 1478975488, heapUsed: 1321977560 }
{ rss: 1054658560, heapTotal: 1011908608, heapUsed: 740494104 }
{ rss: 913444864, heapTotal: 867094528, heapUsed: 712817760 }
{ rss: 895311872, heapTotal: 851140608, heapUsed: 499002232 }
{ rss: 790102016, heapTotal: 743473152, heapUsed: 364448552 }
{ rss: 716824576, heapTotal: 673427456, heapUsed: 379832016 }
{ rss: 578904064, heapTotal: 538619904, heapUsed: 325396784 }
{ rss: 928378880, heapTotal: 885198848, heapUsed: 828237040 }
{ rss: 973627392, heapTotal: 928165888, heapUsed: 735149184 }
{ rss: 756957184, heapTotal: 709603328, heapUsed: 518398760 }
{ rss: 770871296, heapTotal: 727953408, heapUsed: 366851384 }
{ rss: 561799168, heapTotal: 520794112, heapUsed: 325420528 }
{ rss: 937361408, heapTotal: 893587456, heapUsed: 827303968 }
{ rss: 974381056, heapTotal: 929214464, heapUsed: 727962496 }
{ rss: 757248000, heapTotal: 709603328, heapUsed: 518851272 }
{ rss: 745197568, heapTotal: 702808064, heapUsed: 370024896 }
{ rss: 530886656, heapTotal: 489619456, heapUsed: 290741448 }
{ rss: 817655808, heapTotal: 774529024, heapUsed: 259818920 }
{ rss: 878731264, heapTotal: 835915776, heapUsed: 777616080 }
{ rss: 820387840, heapTotal: 775380992, heapUsed: 713900712 }
{ rss: 613335040, heapTotal: 574611456, heapUsed: 321316600 }
{ rss: 936009728, heapTotal: 894976000, heapUsed: 837407768 }
{ rss: 929542144, heapTotal: 886366208, heapUsed: 737177736 }
{ rss: 554635264, heapTotal: 515125248, heapUsed: 294237600 }
... doesn't end of course