ordinary Tuesday           garments=  20000 events=   68324 work=   145646 work/event=   2.1317  expansions=15
worst day (one big load)   garments=  20000 events=   80001 work=   172767 work/event=   2.1596  expansions=15

Intake register alone: 20000 garments logged.
  most expensive single log entry = 16385 slot writes (a table expansion)
  total work                      = 52767
  amortized cost per garment      = 2.6383 slot writes
  aggregate bound proved in 14.7  = 3 per garment, i.e. 60000 in total
  final potential 2*num - size    = 7232
