use salsa's LRU for syntax trees

1 files changed, 3 insertions, 1 deletions

diff --git a/crates/ra_batch/src/lib.rs b/crates/ra_batch/src/lib.rs
index a445dcb4d..02ea89306 100644
--- a/crates/ra_batch/src/lib.rs
+++ b/crates/ra_batch/src/lib.rs
@@ -7,7 +7,7 @@ use std::collections::HashSet;
 use rustc_hash::FxHashMap;
 
 use ra_db::{
-    CrateGraph, FileId, SourceRoot, SourceRootId, SourceDatabase, salsa,
+    CrateGraph, FileId, SourceRoot, SourceRootId, SourceDatabase, salsa::{self, Database},
 };
 use ra_hir::db;
 use ra_project_model::ProjectWorkspace;
@@ -43,6 +43,8 @@ fn vfs_root_to_id(r: ra_vfs::VfsRoot) -> SourceRootId {
 impl BatchDatabase {
     pub fn load(crate_graph: CrateGraph, vfs: &mut Vfs) -> BatchDatabase {
         let mut db = BatchDatabase { runtime: salsa::Runtime::default() };
+        db.query_mut(ra_db::ParseQuery).set_lru_capacity(128);
+        db.query_mut(ra_hir::db::ParseMacroQuery).set_lru_capacity(128);
         db.set_crate_graph(Arc::new(crate_graph));
 
         // wait until Vfs has loaded all roots