bch_time_stats_update
bch_time_stats_update(&state->time, start_time);
bch_time_stats_update(&state->time, start_time);
bch_time_stats_update(&c->btree_gc_time, start_time);
bch_time_stats_update(&b->c->btree_split_time, start_time);
bch_time_stats_update(&b->c->btree_read_time, start_time);
void bch_time_stats_update(struct time_stats *stats, uint64_t time);