diff --git a/Cargo.toml b/Cargo.toml
index 09834d26a85..33d5ef566d0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -132,7 +132,8 @@ flat_map_option              = "warn"
 fn_params_excessive_bools    = "warn"
 from_iter_instead_of_collect = "warn"
 implicit_clone               = "warn"
-implicit_hasher              = "warn"
+# not sure whether it's necessary
+# implicit_hasher              = "warn"
 index_refutable_slice        = "warn"
 inefficient_to_string        = "warn"
 invalid_upcast_comparisons   = "warn"
diff --git a/crates/rspack_core/src/compiler/compilation.rs b/crates/rspack_core/src/compiler/compilation.rs
index 41a3fce8b43..618dddc08ad 100644
--- a/crates/rspack_core/src/compiler/compilation.rs
+++ b/crates/rspack_core/src/compiler/compilation.rs
@@ -1288,7 +1288,7 @@ impl Compilation {
       let entrypoint = self.chunk_group_by_ukey.expect_get(entrypoint_ukey);
       entrypoint.get_runtime_chunk(&self.chunk_group_by_ukey)
     });
-    UkeySet::from_iter(entries.chain(async_entries))
+    entries.chain(async_entries).collect()
   }
 
   #[allow(clippy::unwrap_in_result)]
diff --git a/crates/rspack_core/src/compiler/make/repair/factorize.rs b/crates/rspack_core/src/compiler/make/repair/factorize.rs
index 6ea6e013daa..a6d5eae5b03 100644
--- a/crates/rspack_core/src/compiler/make/repair/factorize.rs
+++ b/crates/rspack_core/src/compiler/make/repair/factorize.rs
@@ -204,7 +204,6 @@ impl Task<MakeTaskContext> for FactorizeResultTask {
       context_dependencies,
       missing_dependencies,
       diagnostics,
-      ..
     } = *self;
     let artifact = &mut context.artifact;
     if !diagnostics.is_empty() {
diff --git a/crates/rspack_core/src/concatenated_module.rs b/crates/rspack_core/src/concatenated_module.rs
index 2a7f71e92c9..2ae5fe99234 100644
--- a/crates/rspack_core/src/concatenated_module.rs
+++ b/crates/rspack_core/src/concatenated_module.rs
@@ -7,7 +7,7 @@ use std::{
 };
 
 use dashmap::DashMap;
-use indexmap::{IndexMap, IndexSet};
+use indexmap::IndexMap;
 use rayon::prelude::*;
 use regex::Regex;
 use rspack_ast::javascript::Ast;
@@ -656,7 +656,7 @@ impl Module for ConcatenatedModule {
       module_to_info_map.insert(id, module_info);
     }
 
-    let mut all_used_names = HashSet::from_iter(RESERVED_NAMES.iter().map(|s| Atom::new(*s)));
+    let mut all_used_names: HashSet<Atom> = RESERVED_NAMES.iter().map(|s| Atom::new(*s)).collect();
     let mut top_level_declarations: HashSet<Atom> = HashSet::default();
 
     for module_info_id in modules_with_info.iter() {
@@ -1042,10 +1042,10 @@ impl Module for ConcatenatedModule {
       for module_info_id in needed_namespace_objects.clone().iter() {
         if visited.contains(module_info_id) {
           continue;
-        } else {
-          visited.insert(*module_info_id);
-          changed = true;
         }
+        visited.insert(*module_info_id);
+        changed = true;
+
         let module_info = module_to_info_map
           .get(module_info_id)
           .map(|m| m.as_concatenated())
@@ -1301,7 +1301,7 @@ impl Module for ConcatenatedModule {
     let runtime = runtime.as_deref();
     for info in self.create_concatenation_list(
       self.root_module_ctxt.id,
-      IndexSet::from_iter(self.modules.iter().map(|item| item.id)),
+      self.modules.iter().map(|item| item.id).collect(),
       runtime,
       &compilation.get_module_graph(),
     ) {
@@ -1417,7 +1417,7 @@ impl ConcatenatedModule {
   ) -> (Vec<ModuleIdentifier>, IdentifierIndexMap<ModuleInfo>) {
     let ordered_concatenation_list = self.create_concatenation_list(
       self.root_module_ctxt.id,
-      IndexSet::from_iter(self.modules.iter().map(|item| item.id)),
+      self.modules.iter().map(|item| item.id).collect(),
       runtime,
       mg,
     );
diff --git a/crates/rspack_core/src/options/resolve/mod.rs b/crates/rspack_core/src/options/resolve/mod.rs
index e3b227fcb6d..a5d0798a313 100644
--- a/crates/rspack_core/src/options/resolve/mod.rs
+++ b/crates/rspack_core/src/options/resolve/mod.rs
@@ -82,7 +82,7 @@ pub struct Resolve {
   /// Configure resolve options by the type of module request.
   pub by_dependency: Option<ByDependency>,
   /// The JSON files to use for descriptions
-  /// Default is ["package.json"]
+  /// Default is [`package.json`]
   pub description_files: Option<DescriptionFiles>,
   /// If enforce_extension is set to EnforceExtension::Enabled, resolution will not allow extension-less files. This means require('./foo.js') will resolve, while require('./foo') will not.
   pub enforce_extension: Option<EnforceExtension>,
diff --git a/crates/rspack_core/src/stats/mod.rs b/crates/rspack_core/src/stats/mod.rs
index 5260294ca71..f147d0fbcc1 100644
--- a/crates/rspack_core/src/stats/mod.rs
+++ b/crates/rspack_core/src/stats/mod.rs
@@ -273,7 +273,7 @@ impl Stats<'_> {
           .into_iter()
           .collect::<IdentifierSet>();
 
-        let mut auxiliary_files = Vec::from_iter(c.auxiliary_files.iter().cloned());
+        let mut auxiliary_files = c.auxiliary_files.iter().cloned().collect::<Vec<_>>();
         auxiliary_files.sort_unstable();
 
         let chunk_modules = if options.chunk_modules {