From bfd6efcedb785e42adf4e4066aee9b86c06dad05 Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Wed, 18 May 2022 13:48:06 -0400
Subject: [PATCH] no need to sort dump if there are less than 2 atoms

---
 src/dump.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dump.cpp b/src/dump.cpp
index 46f1d54848..a7849b6b78 100644
--- a/src/dump.cpp
+++ b/src/dump.cpp
@@ -418,7 +418,7 @@ void Dump::write()
 
   if (sort_flag && sortcol == 0) pack(ids);
   else pack(nullptr);
-  if (sort_flag) sort();
+  if (sort_flag && ntotal > 1) sort();
   if (balance_flag) balance();
 
   // write timestep header