use extract_if and filter existing invalidator

turbopack/crates/turbo-tasks-fs/src/lib.rs

@@ -266,15 +266,22 @@ impl DiskFileSystemInner {
     ) -> Result<Vec<(Invalidator, Option<WriteContent>)>> {
         let mut invalidator_map = self.invalidator_map.lock().unwrap();
         let invalidators = invalidator_map.entry(path_to_key(path)).or_default();
-        let mut old_invalidators = take(invalidators);
-        old_invalidators.remove(&invalidator);
+        let old_invalidators = invalidators
+            .extract_if(|i, old_write_content| {
+                i == &invalidator
+                    || old_write_content
+                        .as_ref()
+                        .is_none_or(|old| old != &write_content)
+            })
+            .filter(|(i, _)| i != &invalidator)
+            .collect::<Vec<_>>();
         invalidators.insert(invalidator, Some(write_content));
         drop(invalidator_map);
         #[cfg(not(any(target_os = "macos", target_os = "windows")))]
         if let Some(dir) = path.parent() {
             self.watcher.ensure_watching(dir, self.root_path())?;
         }
-        Ok(old_invalidators.into_iter().collect())
+        Ok(old_invalidators)
     }
 
     /// registers the path as an invalidator for the current task,