From bb6a4abd6ba021e0967669320419e79f852a418d Mon Sep 17 00:00:00 2001
From: skypjack <michele.caini@gmail.com>
Date: Tue, 24 Feb 2026 15:08:01 +0100
Subject: [PATCH] sparse_set: ::pop_all early exit on empty sets

---
 src/entt/entity/sparse_set.hpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/entt/entity/sparse_set.hpp b/src/entt/entity/sparse_set.hpp
index 9f3ec0b10..2ffdf9062 100644
--- a/src/entt/entity/sparse_set.hpp
+++ b/src/entt/entity/sparse_set.hpp
@@ -294,10 +294,12 @@ protected:
 
     /*! @brief Erases all entities of a sparse set. */
     virtual void pop_all() {
-        // suboptimal with few entities, but exploits cache way more with many
-        for (auto&& elem : sparse) {
-            for (size_type pos{}; pos < traits_type::page_size; ++pos) {
-                elem[pos] = null;
+        if(!packed.empty()) {
+            // suboptimal with few entities, but exploits cache way more with many
+            for(auto &&elem: sparse) {
+                for(size_type pos{}; pos < traits_type::page_size; ++pos) {
+                    elem[pos] = null;
+                }
             }
         }