Merge #5244

5244: Add a command to compute memory usage statistics r=matklad a=jonas-schievink

This allows inspecting memory usage on a live rust-analyzer instance after it has been used interactively.

This will only work with `--features jemalloc`, so maybe it should print something more useful when that's not available? Right now it will just print 0 Bytes for every query.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/crates/ra_ide_db/src/change.rs b/crates/ra_ide_db/src/change.rs
index d8da3f949..84c6f40ff 100644
--- a/crates/ra_ide_db/src/change.rs
+++ b/crates/ra_ide_db/src/change.rs
@@ -164,6 +164,15 @@ impl RootDatabase {
         hir::db::BodyQuery.in_db(self).sweep(sweep);
     }
 
+    // Feature: Memory Usage
+    //
+    // Clears rust-analyzer's internal database and prints memory usage statistics.
+    //
+    // |===
+    // | Editor  | Action Name
+    //
+    // | VS Code | **Rust Analyzer: Memory Usage (Clears Database)**
+    // |===
     pub fn per_query_memory_usage(&mut self) -> Vec<(String, Bytes)> {
         let mut acc: Vec<(String, Bytes)> = vec![];
         let sweep = SweepStrategy::default().discard_values().sweep_all_revisions();