gc_trace
gc_trace — controls the tracing of garbage collection.
gc_trace (on_flag)
on_flagIf non-nil,
turn on garbage collector tracing, else turn it off.
The new status of garbage collector tracing.
This function turns on (on-flag is non-nil) or off (on-flag is nil) the tracing of garbage
collection. When garbage collection tracing is on, statistics are collected
concerning the number of allocated cells, number of collection calls, and
the elapsed time spent within the garbage collector. These statistics can be
accessed using a call to allocated-cells.
Gamma> gc_trace (t);
nil