Benchmark: timing 5000 iterations of memory, no_memory...
    memory:  1 wallclock secs ( 1.10 usr +  0.00 sys =  1.10 CPU) @ 4545.45/s (n=5000)
 no_memory:  1 wallclock secs ( 0.81 usr +  0.00 sys =  0.81 CPU) @ 6172.84/s (n=5000)