opt-in jemalloc

crates/ra_ide_api/src/lib.rs

@@ -61,6 +61,7 @@ pub use ra_db::{
 
 // We use jemalloc mainly to get heap usage statistics, actual performance
 // differnece is not measures.
+#[cfg(feature = "jemalloc")]
 #[global_allocator]
 static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
 

crates/ra_ide_api/src/status.rs

@@ -133,6 +133,7 @@ struct MemoryStats {
 }
 
 impl MemoryStats {
+    #[cfg(feature = "jemalloc")]
     fn current() -> MemoryStats {
         jemalloc_ctl::epoch().unwrap();
         MemoryStats {
@@ -140,6 +141,14 @@ impl MemoryStats {
             resident: Bytes(jemalloc_ctl::stats::resident().unwrap()),
         }
     }
+
+    #[cfg(not(feature = "jemalloc"))]
+    fn current() -> MemoryStats {
+        MemoryStats {
+            allocated: Bytes(0),
+            resident: Bytes(0),
+        }
+    }
 }
 
 impl fmt::Display for MemoryStats {