take series takes a snapshot of the profiling annotations on the values
in the minor and major heaps, together with GC stats, and write the
result to the
series file. This function triggers a minor GC but does
not allocate any memory itself.
If the optional
time is specified, it will be used instead of the
result of
Sys.time as the timestamp of the snapshot. Such
times
should start from zero and be monotonically increasing. This parameter
is intended to be used so that snapshots can be correlated against wall
clock time (which is not supported in the standard library) rather than
elapsed CPU time.