diff --git a/src/main.rs b/src/main.rs
index de67911..179bfba 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -831,8 +831,8 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             }
             // sleep as much as the loop recurs per 1 seconds if all operation finished within 1 seconds.
             elapsed_time = instant.elapsed().as_millis();
-            if 1_000 > elapsed_time {
-                sleep(Duration::from_millis((1_000 - elapsed_time) as u64)).await;
+            if 500 > elapsed_time {
+                sleep(Duration::from_millis((500 - elapsed_time) as u64)).await;
             }
         }
     });