Merge #8284

8284: Reduce memory usage by using global `Arc`-based interning r=jonas-schievink a=jonas-schievink

This saves around 50 mb when running `analysis-stats` on r-a itself. Not a lot, but this infra can be easily reused to intern more stuff.

Co-authored-by: Jonas Schievink <[email protected]>

2 files changed, 5 insertions, 5 deletions

diff --git a/crates/hir/src/display.rs b/crates/hir/src/display.rs
index 97a78ca25..ab04c55bc 100644
--- a/crates/hir/src/display.rs
+++ b/crates/hir/src/display.rs
@@ -91,7 +91,7 @@ impl HirDisplay for Function {
         let ret_type = if !qual.is_async {
             &data.ret_type
         } else {
-            match &data.ret_type {
+            match &*data.ret_type {
                 TypeRef::ImplTrait(bounds) => match &bounds[0] {
                     TypeBound::Path(path) => {
                         path.segments().iter().last().unwrap().args_and_bindings.unwrap().bindings
diff --git a/crates/hir/src/lib.rs b/crates/hir/src/lib.rs
index 97f162315..06fd6542d 100644
--- a/crates/hir/src/lib.rs
+++ b/crates/hir/src/lib.rs
@@ -957,7 +957,7 @@ impl SelfParam {
         func_data
             .params
             .first()
-            .map(|param| match *param {
+            .map(|param| match &**param {
                 TypeRef::Reference(.., mutability) => match mutability {
                     hir_def::type_ref::Mutability::Shared => Access::Shared,
                     hir_def::type_ref::Mutability::Mut => Access::Exclusive,
@@ -1011,7 +1011,7 @@ impl Const {
     }
 
     pub fn type_ref(self, db: &dyn HirDatabase) -> TypeRef {
-        db.const_data(self.id).type_ref.clone()
+        db.const_data(self.id).type_ref.as_ref().clone()
     }
 }
 
@@ -1101,7 +1101,7 @@ impl TypeAlias {
     }
 
     pub fn type_ref(self, db: &dyn HirDatabase) -> Option<TypeRef> {
-        db.type_alias_data(self.id).type_ref.clone()
+        db.type_alias_data(self.id).type_ref.as_deref().cloned()
     }
 
     pub fn ty(self, db: &dyn HirDatabase) -> Type {
@@ -1615,7 +1615,7 @@ impl Impl {
     // FIXME: the return type is wrong. This should be a hir version of
     // `TraitRef` (ie, resolved `TypeRef`).
     pub fn trait_(self, db: &dyn HirDatabase) -> Option<TraitRef> {
-        db.impl_data(self.id).target_trait.clone()
+        db.impl_data(self.id).target_trait.as_deref().cloned()
     }
 
     pub fn self_ty(self, db: &dyn HirDatabase) -> Type {