no_compactions
takes precedence over gc_prefs.
`Low)
`Low will print only the output of the benchmarking`Mid will additionally print time estimates and a status line`High will additionally print information at each step`Wall)
`Wall will include waiting on I/O or when process is suspended/descheduled`Cpu will only count time spent on computations.bench foo is equivalent to print (bench_raw foo).
Returns a list documenting the runtimes rather than printing to stdout. These can be fed to print for results identical to calling bench.