diff --git a/crates/acp_thread/src/diff.rs b/crates/acp_thread/src/diff.rs
index d04cabb39d73050022200c881a8b7369482d618c..9e47e70814b01011afc8b854824ae025b524b3f6 100644
--- a/crates/acp_thread/src/diff.rs
+++ b/crates/acp_thread/src/diff.rs
@@ -90,9 +90,10 @@ impl Diff {
             let mut diff = BufferDiff::new_unchanged(&buffer_text_snapshot, cx);
             diff.language_changed(language.clone(), language_registry.clone(), cx);
             let secondary_diff = cx.new(|cx| {
-                let mut diff = BufferDiff::new_unchanged(&buffer_text_snapshot, cx);
-                diff.language_changed(language, language_registry, cx);
-                diff
+                // For the secondary diff buffer we skip assigning the language as we do not really need to perform any syntax highlighting on
+                // it. As a result, by skipping it we are potentially shaving off a lot of RSS plus we get a snappier feel for large diff
+                // view multibuffers.
+                BufferDiff::new_unchanged(&buffer_text_snapshot, cx)
             });
             diff.set_secondary_diff(secondary_diff);
             diff
@@ -408,7 +409,6 @@ async fn build_buffer_diff(
 
     secondary_diff
         .update(cx, |secondary_diff, cx| {
-            secondary_diff.language_changed(language.clone(), language_registry.clone(), cx);
             secondary_diff.set_snapshot(update.clone(), &buffer, cx)
         })
         .await;