diff --git a/crates/loro-core/src/container/map/map_container.rs b/crates/loro-core/src/container/map/map_container.rs
index d0068820..935ac419 100644
--- a/crates/loro-core/src/container/map/map_container.rs
+++ b/crates/loro-core/src/container/map/map_container.rs
@@ -1,4 +1,4 @@
-use std::sync::Arc;
+
 
 use fxhash::FxHashMap;
 
diff --git a/crates/loro-core/src/container/text/text_container.rs b/crates/loro-core/src/container/text/text_container.rs
index fab2bba0..5fc4eee6 100644
--- a/crates/loro-core/src/container/text/text_container.rs
+++ b/crates/loro-core/src/container/text/text_container.rs
@@ -85,7 +85,7 @@ impl Container for TextContainer {
     }
 
     fn apply(&mut self, op: &OpProxy) {
-        let content = op.content_sliced();
+        let _content = op.content_sliced();
         todo!()
     }
 
diff --git a/crates/loro-core/src/dag/test.rs b/crates/loro-core/src/dag/test.rs
index 58a4b12e..bb1421bc 100644
--- a/crates/loro-core/src/dag/test.rs
+++ b/crates/loro-core/src/dag/test.rs
@@ -200,7 +200,7 @@ impl TestDag {
         }
         update_frontier(&mut self.frontier, node.id_last(), &node.deps);
         let contains_start = self.contains(node.id_start());
-        let mut arr = self.nodes.entry(client_id).or_default();
+        let arr = self.nodes.entry(client_id).or_default();
         if contains_start {
             arr.pop();
             arr.push(node.clone());
@@ -542,7 +542,7 @@ mod find_path {
         }
 
         // println!("{}", a.mermaid());
-        let mut vec: Vec<_> = nodes.iter().enumerate().collect();
+        let vec: Vec<_> = nodes.iter().enumerate().collect();
         for &(i, (node, vv)) in vec.iter() {
             if i > 3 {
                 break;
@@ -1059,7 +1059,7 @@ mod dag_partial_iter {
                 break;
             }
 
-            for &(j, (other_node, other_vv)) in vec.iter() {
+            for &(j, (_other_node, other_vv)) in vec.iter() {
                 if i >= j {
                     continue;
                 }
diff --git a/crates/loro-core/src/log_store.rs b/crates/loro-core/src/log_store.rs
index 4fb71601..e0224a80 100644
--- a/crates/loro-core/src/log_store.rs
+++ b/crates/loro-core/src/log_store.rs
@@ -15,7 +15,7 @@ use smallvec::SmallVec;
 use crate::{
     change::{Change, ChangeMergeCfg},
     configure::Configure,
-    container::{manager::ContainerManager, text::string_pool::StringPool, Container},
+    container::{manager::ContainerManager, Container},
     id::{ClientID, Counter},
     op::OpProxy,
     Lamport, Op, Timestamp, ID,
@@ -70,7 +70,9 @@ impl LogStore {
         container: Arc<RwLock<ContainerManager>>,
     ) -> Arc<RwLock<Self>> {
         let this_client_id = client_id.unwrap_or_else(|| cfg.rand.next_u64());
-        let mut this = Arc::new(RwLock::new(Self {
+        
+
+        Arc::new(RwLock::new(Self {
             cfg,
             this_client_id,
             changes: FxHashMap::default(),
@@ -79,9 +81,7 @@ impl LogStore {
             frontier: Default::default(),
             container,
             _pin: PhantomPinned,
-        }));
-
-        this
+        }))
     }
 
     #[inline]
diff --git a/crates/loro-core/src/version.rs b/crates/loro-core/src/version.rs
index 6fbff620..ac6a02fd 100644
--- a/crates/loro-core/src/version.rs
+++ b/crates/loro-core/src/version.rs
@@ -1,6 +1,6 @@
 use std::{
     cmp::Ordering,
-    ops::{Deref, DerefMut, Sub},
+    ops::{Deref, DerefMut},
 };
 
 use fxhash::FxHashMap;