elapsed_time_from 8588 gc.c           	record->gc_time = elapsed_time_from(record->gc_invoke_time);
elapsed_time_from 8613 gc.c           	record->gc_mark_time = elapsed_time_from(record->gc_mark_time);
elapsed_time_from 8641 gc.c           	    sweep_time = elapsed_time_from(objspace->profile.gc_sweep_start_time);
elapsed_time_from 8646 gc.c           	    sweep_time = elapsed_time_from(objspace->profile.gc_sweep_start_time);