diff --git a/src/clang_complete.cc b/src/clang_complete.cc
index 0dbf9979..ee8d954b 100644
--- a/src/clang_complete.cc
+++ b/src/clang_complete.cc
@@ -188,17 +188,15 @@ bool Parse(CompilerInstance &Clang) {
   return true;
 }
 
-void CompletionPreloadMain(CompletionManager *completion_manager) {
+void CompletionPreloadMain(CompletionManager *manager) {
   while (true) {
     // Fetching the completion request blocks until we have a request.
-    auto request = completion_manager->preload_requests_.Dequeue();
+    auto request = manager->preload_requests_.Dequeue();
 
     // If we don't get a session then that means we don't care about the file
     // anymore - abandon the request.
-    std::shared_ptr<CompletionSession> session =
-        completion_manager->TryGetSession(request.path,
-                                          false /*mark_as_completion*/,
-                                          false /*create_if_needed*/);
+    std::shared_ptr<CompletionSession> session = manager->TryGetSession(
+        request.path, false /*mark_as_completion*/, false /*create_if_needed*/);
     if (!session)
       continue;
 
@@ -210,6 +208,11 @@ void CompletionPreloadMain(CompletionManager *completion_manager) {
     if (std::unique_ptr<CompilerInvocation> CI =
             BuildCompilerInvocation(args, session->FS))
       session->BuildPreamble(*CI);
+    if (g_config->diagnostics.onSave) {
+      lsTextDocumentIdentifier document;
+      document.uri = lsDocumentUri::FromPath(request.path);
+      manager->diagnostic_request_.PushBack({document}, true);
+    }
   }
 }
 
@@ -405,7 +408,7 @@ void CompletionManager::DiagnosticsUpdate(
 void CompletionManager::NotifyView(const std::string &path) {
   // Only reparse the file if we create a new CompletionSession.
   if (EnsureCompletionOrCreatePreloadSession(path))
-    preload_requests_.PushBack(PreloadRequest(path), true);
+    preload_requests_.PushBack(PreloadRequest{path}, true);
 }
 
 void CompletionManager::NotifySave(const std::string &filename) {
@@ -414,7 +417,7 @@ void CompletionManager::NotifySave(const std::string &filename) {
   //
 
   EnsureCompletionOrCreatePreloadSession(filename);
-  preload_requests_.PushBack(PreloadRequest(filename), true);
+  preload_requests_.PushBack(PreloadRequest{filename}, true);
 }
 
 void CompletionManager::NotifyClose(const std::string &filename) {
diff --git a/src/clang_complete.hh b/src/clang_complete.hh
index 5c2b2df2..f22dd849 100644
--- a/src/clang_complete.hh
+++ b/src/clang_complete.hh
@@ -74,10 +74,6 @@ struct CompletionManager {
   using OnDropped = std::function<void(lsRequestId request_id)>;
 
   struct PreloadRequest {
-    PreloadRequest(const std::string &path)
-        : request_time(std::chrono::high_resolution_clock::now()), path(path) {}
-
-    std::chrono::time_point<std::chrono::high_resolution_clock> request_time;
     std::string path;
   };
   struct CompletionRequest {
diff --git a/src/messages/textDocument_didSave.cc b/src/messages/textDocument_didSave.cc
index 9d9b7101..25c8bc81 100644
--- a/src/messages/textDocument_didSave.cc
+++ b/src/messages/textDocument_didSave.cc
@@ -37,8 +37,6 @@ struct Handler_TextDocumentDidSave
     Project::Entry entry = project->FindCompilationEntryForFile(path);
     pipeline::Index(entry.filename, entry.args, IndexMode::Normal);
     clang_complete->NotifySave(path);
-    if (g_config->diagnostics.onSave)
-      clang_complete->DiagnosticsUpdate(params.textDocument);
   }
 };
 REGISTER_MESSAGE_HANDLER(Handler_TextDocumentDidSave);
diff --git a/src/query.cc b/src/query.cc
index 3b114be4..6d15965a 100644
--- a/src/query.cc
+++ b/src/query.cc
@@ -238,36 +238,37 @@ void DB::ApplyIndexUpdate(IndexUpdate *u) {
         .outline2refcnt[SymbolRef{{dr.extent, usr, kind, dr.role}}] += delta;
   };
 
-  auto UpdateUses = [&](Usr usr, SymbolKind kind,
-                        llvm::DenseMap<WrappedUsr, int> &entity_usr,
-                        auto &entities, auto &p, bool hint_implicit) {
-    auto R = entity_usr.try_emplace({usr}, entity_usr.size());
-    if (R.second)
-      vars.emplace_back().usr = usr;
-    auto &entity = entities[R.first->second];
-    for (Use &use : p.first) {
-      if (hint_implicit && use.role & Role::Implicit) {
-        // Make ranges of implicit function calls larger (spanning one more
-        // column to the left/right). This is hacky but useful. e.g.
-        // textDocument/definition on the space/semicolon in `A a;` or ` 42;`
-        // will take you to the constructor.
-        if (use.range.start.column > 0)
-          use.range.start.column--;
-        use.range.end.column++;
-      }
-      Ref(prev_lid2file_id, usr, kind, use, -1);
-    }
-    RemoveRange(entity.uses, p.first);
-    for (Use &use : p.second) {
-      if (hint_implicit && use.role & Role::Implicit) {
-        if (use.range.start.column > 0)
-          use.range.start.column--;
-        use.range.end.column++;
-      }
-      Ref(lid2file_id, usr, kind, use, 1);
-    }
-    AddRange(entity.uses, p.second);
-  };
+  auto UpdateUses =
+      [&](Usr usr, SymbolKind kind,
+          llvm::DenseMap<Usr, int, DenseMapInfoForUsr> &entity_usr,
+          auto &entities, auto &p, bool hint_implicit) {
+        auto R = entity_usr.try_emplace(usr, entity_usr.size());
+        if (R.second)
+          vars.emplace_back().usr = usr;
+        auto &entity = entities[R.first->second];
+        for (Use &use : p.first) {
+          if (hint_implicit && use.role & Role::Implicit) {
+            // Make ranges of implicit function calls larger (spanning one more
+            // column to the left/right). This is hacky but useful. e.g.
+            // textDocument/definition on the space/semicolon in `A a;` or `
+            // 42;` will take you to the constructor.
+            if (use.range.start.column > 0)
+              use.range.start.column--;
+            use.range.end.column++;
+          }
+          Ref(prev_lid2file_id, usr, kind, use, -1);
+        }
+        RemoveRange(entity.uses, p.first);
+        for (Use &use : p.second) {
+          if (hint_implicit && use.role & Role::Implicit) {
+            if (use.range.start.column > 0)
+              use.range.start.column--;
+            use.range.end.column++;
+          }
+          Ref(lid2file_id, usr, kind, use, 1);
+        }
+        AddRange(entity.uses, p.second);
+      };
 
   if (u->files_removed)
     files[name2file_id[LowerPathIfInsensitive(*u->files_removed)]].def =
diff --git a/src/query.h b/src/query.h
index aa597e6c..1eaa6499 100644
--- a/src/query.h
+++ b/src/query.h
@@ -136,14 +136,11 @@ struct IndexUpdate {
   UseUpdate vars_uses;
 };
 
-struct WrappedUsr {
-  Usr usr;
-};
-template <> struct llvm::DenseMapInfo<WrappedUsr> {
-  static inline WrappedUsr getEmptyKey() { return {0}; }
-  static inline WrappedUsr getTombstoneKey() { return {~0ULL}; }
-  static unsigned getHashValue(WrappedUsr w) { return w.usr; }
-  static bool isEqual(WrappedUsr l, WrappedUsr r) { return l.usr == r.usr; }
+struct DenseMapInfoForUsr {
+  static inline Usr getEmptyKey() { return 0; }
+  static inline Usr getTombstoneKey() { return ~0ULL; }
+  static unsigned getHashValue(Usr w) { return w; }
+  static bool isEqual(Usr l, Usr r) { return l == r; }
 };
 
 using Lid2file_id = std::unordered_map<int, int>;
@@ -153,7 +150,7 @@ using Lid2file_id = std::unordered_map<int, int>;
 struct DB {
   std::vector<QueryFile> files;
   llvm::StringMap<int> name2file_id;
-  llvm::DenseMap<WrappedUsr, int> func_usr, type_usr, var_usr;
+  llvm::DenseMap<Usr, int, DenseMapInfoForUsr> func_usr, type_usr, var_usr;
   std::vector<QueryFunc> funcs;
   std::vector<QueryType> types;
   std::vector<QueryVar> vars;
@@ -173,13 +170,13 @@ struct DB {
               std::vector<std::pair<Usr, QueryVar::Def>> &&us);
   std::string_view GetSymbolName(SymbolIdx sym, bool qualified);
 
-  bool HasFunc(Usr usr) const { return func_usr.count({usr}); }
-  bool HasType(Usr usr) const { return type_usr.count({usr}); }
-  bool HasVar(Usr usr) const { return var_usr.count({usr}); }
+  bool HasFunc(Usr usr) const { return func_usr.count(usr); }
+  bool HasType(Usr usr) const { return type_usr.count(usr); }
+  bool HasVar(Usr usr) const { return var_usr.count(usr); }
 
-  QueryFunc &Func(Usr usr) { return funcs[func_usr[{usr}]]; }
-  QueryType &Type(Usr usr) { return types[type_usr[{usr}]]; }
-  QueryVar &Var(Usr usr) { return vars[var_usr[{usr}]]; }
+  QueryFunc &Func(Usr usr) { return funcs[func_usr[usr]]; }
+  QueryType &Type(Usr usr) { return types[type_usr[usr]]; }
+  QueryVar &Var(Usr usr) { return vars[var_usr[usr]]; }
 
   QueryFile &GetFile(SymbolIdx ref) { return files[ref.usr]; }
   QueryFunc &GetFunc(SymbolIdx ref) { return Func(ref.usr); }
diff --git a/src/query_utils.cc b/src/query_utils.cc
index d07dccc6..963166a5 100644
--- a/src/query_utils.cc
+++ b/src/query_utils.cc
@@ -18,9 +18,9 @@ int ComputeRangeSize(const Range &range) {
 }
 
 template <typename Q>
-std::vector<Use> GetDeclarations(llvm::DenseMap<WrappedUsr, int> &entity_usr,
-                                 std::vector<Q> &entities,
-                                 const std::vector<Usr> &usrs) {
+std::vector<Use>
+GetDeclarations(llvm::DenseMap<Usr, int, DenseMapInfoForUsr> &entity_usr,
+                std::vector<Q> &entities, const std::vector<Usr> &usrs) {
   std::vector<Use> ret;
   ret.reserve(usrs.size());
   for (Usr usr : usrs) {