let per_iter_time = Duration::from_millis(1000 / store.get_u64(U64Setting::ConnsPerSec));
let start_time = Instant::now();
let mut iter_time = start_time;
let per_iter_time = Duration::from_millis(1000 / store.get_u64(U64Setting::ConnsPerSec));
let start_time = Instant::now();
let mut iter_time = start_time;