Fix some clippy perf warnings

4 files changed, 8 insertions, 9 deletions

diff --git a/crates/ra_db/src/fixture.rs b/crates/ra_db/src/fixture.rs
index f6b50c67c..482a2f3e6 100644
--- a/crates/ra_db/src/fixture.rs
+++ b/crates/ra_db/src/fixture.rs
@@ -267,8 +267,8 @@ impl From<&FixtureMeta> for ParsedMeta {
                 ParsedMeta::Root { path: path.to_owned() }
             }
             FixtureMeta::File(f) => Self::File(FileMeta {
-                path: f.path.to_owned().into(),
-                krate: f.crate_name.to_owned().into(),
+                path: f.path.to_owned(),
+                krate: f.crate_name.to_owned(),
                 deps: f.deps.to_owned(),
                 cfg: f.cfg.to_owned(),
                 edition: f
diff --git a/crates/ra_hir_def/src/lang_item.rs b/crates/ra_hir_def/src/lang_item.rs
index d962db3cc..3516784b8 100644
--- a/crates/ra_hir_def/src/lang_item.rs
+++ b/crates/ra_hir_def/src/lang_item.rs
@@ -164,7 +164,7 @@ impl LangItems {
         T: Into<AttrDefId> + Copy,
     {
         if let Some(lang_item_name) = lang_attr(db, item) {
-            self.items.entry(lang_item_name.clone()).or_insert_with(|| constructor(item));
+            self.items.entry(lang_item_name).or_insert_with(|| constructor(item));
         }
     }
 }
diff --git a/crates/ra_hir_ty/src/traits/builtin.rs b/crates/ra_hir_ty/src/traits/builtin.rs
index ccab246bf..88a422d2c 100644
--- a/crates/ra_hir_ty/src/traits/builtin.rs
+++ b/crates/ra_hir_ty/src/traits/builtin.rs
@@ -290,8 +290,7 @@ fn trait_object_unsize_impl_datum(
     let self_trait_ref = TraitRef { trait_, substs: self_substs };
     let where_clauses = vec![GenericPredicate::Implemented(self_trait_ref)];
 
-    let impl_substs =
-        Substs::builder(2).push(self_ty).push(Ty::Dyn(target_bounds.clone().into())).build();
+    let impl_substs = Substs::builder(2).push(self_ty).push(Ty::Dyn(target_bounds.into())).build();
 
     let trait_ref = TraitRef { trait_: unsize_trait, substs: impl_substs };
 
diff --git a/crates/ra_ide/src/ssr.rs b/crates/ra_ide/src/ssr.rs
index 1873d1d0d..130d3b4c3 100644
--- a/crates/ra_ide/src/ssr.rs
+++ b/crates/ra_ide/src/ssr.rs
@@ -196,10 +196,10 @@ fn find(pattern: &SsrPattern, code: &SyntaxNode) -> SsrMatches {
     ) -> Option<Match> {
         let match_ = check_opt_nodes(pattern.path(), code.path(), placeholders, match_)?;
 
-        let mut pattern_fields =
-            pattern.record_field_list().map(|x| x.fields().collect()).unwrap_or(vec![]);
-        let mut code_fields =
-            code.record_field_list().map(|x| x.fields().collect()).unwrap_or(vec![]);
+        let mut pattern_fields: Vec<RecordField> =
+            pattern.record_field_list().map(|x| x.fields().collect()).unwrap_or_default();
+        let mut code_fields: Vec<RecordField> =
+            code.record_field_list().map(|x| x.fields().collect()).unwrap_or_default();
 
         if pattern_fields.len() != code_fields.len() {
             return None;