diff --git a/crates/ra_ide/src/change.rs b/crates/ra_ide/src/change.rs
index b0aa2c8e029..ce617840cfa 100644
--- a/crates/ra_ide/src/change.rs
+++ b/crates/ra_ide/src/change.rs
@@ -166,13 +166,15 @@ pub fn prepare(
 const GC_COOLDOWN: time::Duration = time::Duration::from_millis(100);
 
 impl RootDatabase {
+    pub(crate) fn request_cancellation(&mut self) {
+        let _p = profile("RootDatabase::request_cancellation");
+        self.salsa_runtime_mut().synthetic_write(Durability::LOW);
+    }
+
     pub(crate) fn apply_change(&mut self, change: AnalysisChange) {
         let _p = profile("RootDatabase::apply_change");
+        self.request_cancellation();
         log::info!("apply_change {:?}", change);
-        {
-            let _p = profile("RootDatabase::apply_change/cancellation");
-            self.salsa_runtime_mut().synthetic_write(Durability::LOW);
-        }
         if !change.new_roots.is_empty() {
             let mut local_roots = Vec::clone(&self.local_roots());
             for (root_id, is_local) in change.new_roots {
diff --git a/crates/ra_ide/src/lib.rs b/crates/ra_ide/src/lib.rs
index 4d8deb21c8b..62fe6d2a9be 100644
--- a/crates/ra_ide/src/lib.rs
+++ b/crates/ra_ide/src/lib.rs
@@ -202,6 +202,9 @@ pub fn collect_garbage(&mut self) {
     pub fn per_query_memory_usage(&mut self) -> Vec<(String, ra_prof::Bytes)> {
         self.db.per_query_memory_usage()
     }
+    pub fn request_cancellation(&mut self) {
+        self.db.request_cancellation();
+    }
     pub fn raw_database(
         &self,
     ) -> &(impl hir::db::HirDatabase + salsa::Database + ra_db::SourceDatabaseExt) {
diff --git a/crates/ra_lsp_server/src/main_loop.rs b/crates/ra_lsp_server/src/main_loop.rs
index 746a8fbe920..83adf9711fe 100644
--- a/crates/ra_lsp_server/src/main_loop.rs
+++ b/crates/ra_lsp_server/src/main_loop.rs
@@ -210,7 +210,7 @@ pub fn main_loop(
             )?;
         }
     }
-
+    world_state.analysis_host.request_cancellation();
     log::info!("waiting for tasks to finish...");
     task_receiver.into_iter().for_each(|task| {
         on_task(task, &connection.sender, &mut loop_state.pending_requests, &mut world_state)