diff --git a/src/engine.rs b/src/engine.rs
index ef5f28f5..3374c12b 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -336,19 +336,13 @@ where
             memtable
                 .read()
                 .fetch_entries_to(begin, end, max_size, &mut ents_idx)?;
-            println!(
-                "[fetch_entries_to_aio] (stage1) time cost: {:?} us",
-                start.elapsed().as_micros()
-            );
+            
 
             let bytes = self.pipe_log.async_read_bytes(&mut ents_idx).unwrap();
             parse_entries_from_bytes::<M>(bytes, &mut ents_idx, vec);
 
             ENGINE_READ_ENTRY_COUNT_HISTOGRAM.observe(ents_idx.len() as f64);
-            println!(
-                "[fetch_entries_to_aio] (end) time cost: {:?} us",
-                start.elapsed().as_micros()
-            );
+            
             return Ok(ents_idx.len());
         }
 
@@ -846,66 +840,24 @@ mod tests {
                     assert_eq!(d, &data);
                 });
             }
-
-            // Recover the engine.
-            let engine = engine.reopen();
             for i in 10..20 {
                 let rid = i;
                 let index = i;
-                engine.scan_entries(rid, index, index + 2, |_, q, d| {
+                engine.scan_entries_aio(rid, index, index + 2, |_, q, d| {
                     assert_eq!(q, LogQueue::Append);
                     assert_eq!(d, &data);
                 });
             }
-        }
-    }
 
-    #[test]
-    fn test_async_read() {
-        let normal_batch_size = 10;
-        let compressed_batch_size = 5120;
-        for &entry_size in &[normal_batch_size] {
-            if entry_size == normal_batch_size {
-                println!("[normal_batch_size]");
-            } else if entry_size == compressed_batch_size {
-                println!("[compressed_batch_size]");
-            }
-            let dir = tempfile::Builder::new()
-                .prefix("test_get_entry")
-                .tempdir()
-                .unwrap();
-            let cfg = Config {
-                dir: dir.path().to_str().unwrap().to_owned(),
-                target_file_size: ReadableSize::gb(1),
-                ..Default::default()
-            };
-
-            let engine =
-                RaftLogEngine::open_with_file_system(cfg.clone(), Arc::new(DefaultFileSystem))
-                    .unwrap();
-
-            assert_eq!(engine.path(), dir.path().to_str().unwrap());
-            let data = vec![b'x'; entry_size];
-            for i in 10..1010 {
-                for rid in 10..15 {
-                    let index = i;
-                    engine.append(rid, index, index + 1, Some(&data));
-                }
-            }
-            for i in 10..15 {
+            // Recover the engine.
+            let engine = engine.reopen();
+            for i in 10..20 {
                 let rid = i;
-                let index = 10;
-                println!("[PREAD]");
-                engine.scan_entries(rid, index, index + 1000, |_, q, d| {
-                    assert_eq!(q, LogQueue::Append);
-                    assert_eq!(d, &data);
-                });
-                println!("[AIO]");
-                engine.scan_entries_aio(rid, index, index + 1000, |_, q, d| {
+                let index = i;
+                engine.scan_entries(rid, index, index + 2, |_, q, d| {
                     assert_eq!(q, LogQueue::Append);
                     assert_eq!(d, &data);
                 });
-                println!("====================================================================================");
             }
         }
     }