diff --git a/Libraries/LibWeb/HTML/HTMLSelectElement.cpp b/Libraries/LibWeb/HTML/HTMLSelectElement.cpp
index 42070623503..34207d6c88d 100644
--- a/Libraries/LibWeb/HTML/HTMLSelectElement.cpp
+++ b/Libraries/LibWeb/HTML/HTMLSelectElement.cpp
@@ -2,6 +2,7 @@
  * Copyright (c) 2020, the SerenityOS developers.
  * Copyright (c) 2021-2022, Andreas Kling <andreas@ladybird.org>
  * Copyright (c) 2023, Bastiaan van der Plaat <bastiaan.v.d.plaat@gmail.com>
+ * Copyright (c) 2025, Shannon Booth <shannon@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -292,9 +293,36 @@ i32 HTMLSelectElement::default_tab_index_value() const
     return 0;
 }
 
+bool HTMLSelectElement::can_skip_children_changed_selectedness_update(ChildrenChangedMetadata const& metadata) const
+{
+    // If the following criteria are met, there is no need to re-run the selectedness algorithm.
+    // FIXME: We can tighten up these conditions and skip even more work!
+    if (metadata.type != ChildrenChangedMetadata::Type::Inserted)
+        return false;
+
+    if (auto* option = as_if<HTMLOptionElement>(*metadata.node)) {
+        if (option->selected())
+            return false;
+
+        if (m_cached_number_of_selected_options >= 2)
+            return false;
+
+        if (display_size() == 1 && m_cached_number_of_selected_options == 0)
+            return false;
+
+        return true;
+    }
+
+    return false;
+}
+
 void HTMLSelectElement::children_changed(ChildrenChangedMetadata const* metadata)
 {
     Base::children_changed(metadata);
+
+    if (metadata && can_skip_children_changed_selectedness_update(*metadata))
+        return;
+
     update_cached_list_of_options();
     update_selectedness();
 }
diff --git a/Libraries/LibWeb/HTML/HTMLSelectElement.h b/Libraries/LibWeb/HTML/HTMLSelectElement.h
index 9f563200acf..ddea134edaf 100644
--- a/Libraries/LibWeb/HTML/HTMLSelectElement.h
+++ b/Libraries/LibWeb/HTML/HTMLSelectElement.h
@@ -110,6 +110,7 @@ private:
     virtual void computed_properties_changed() override;
 
     virtual void children_changed(ChildrenChangedMetadata const*) override;
+    bool can_skip_children_changed_selectedness_update(ChildrenChangedMetadata const& metadata) const;
 
     void update_cached_list_of_options() const;
     void show_the_picker_if_applicable();