From 53e27efef22c02c89407a0ba8f320fec7e6b4bf7 Mon Sep 17 00:00:00 2001
From: Anton <anton@modernanimal.com>
Date: Thu, 21 Jul 2022 11:02:38 -0700
Subject: [PATCH 1/2] Use exists query instead of count in
 clean-duplicate_history command.

---
 AUTHORS.rst                                                | 1 +
 CHANGES.rst                                                | 1 +
 .../management/commands/clean_duplicate_history.py         | 7 ++++---
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/AUTHORS.rst b/AUTHORS.rst
index 0cc8502d9..bc5eaf2ef 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -16,6 +16,7 @@ Authors
 - Alexander Anikeev
 - Amanda Ng (`AmandaCLNg <https://github.com/AmandaCLNg>`_)
 - Amartis Gladius (`Amartis <https://github.com/amartis>`_)
+- Anton Kulikov (`bigtimecriminal <https://github.com/bigtimecriminal>`_)
 - Ben Lawson (`blawson <https://github.com/blawson>`_)
 - Benjamin Mampaey (`bmampaey <https://github.com/bmampaey>`_)
 - `bradford281 <https://github.com/bradford281>`_
diff --git a/CHANGES.rst b/CHANGES.rst
index 344dc8d7e..51ea91166 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,7 @@ Changes
 Unreleased
 ----------
 
+- Started using ``exists`` query instead of ``count`` in ``clean-duplicate_history`` command
 - Fixed typos in the docs
 - Removed n+1 query from ``bulk_create_with_history`` utility (gh-975)
 - Started using ``exists`` query instead of ``count`` in ``populate_history`` command (gh-982)
diff --git a/simple_history/management/commands/clean_duplicate_history.py b/simple_history/management/commands/clean_duplicate_history.py
index 298238d80..59ff2be74 100644
--- a/simple_history/management/commands/clean_duplicate_history.py
+++ b/simple_history/management/commands/clean_duplicate_history.py
@@ -66,9 +66,10 @@ def _process(self, to_process, date_back=None, dry_run=True):
             m_qs = history_model.objects
             if stop_date:
                 m_qs = m_qs.filter(history_date__gte=stop_date)
-            found = m_qs.count()
-            self.log(f"{model} has {found} historical entries", 2)
-            if not found:
+            if self.verbosity >= 2:
+                found = m_qs.count()
+                self.log(f"{model} has {found} historical entries", 2)
+            if not m_qs.exists():
                 continue
 
             # Break apart the query so we can add additional filtering

From bf8bfd2beda7f4d6a21c963c929e773d59e39953 Mon Sep 17 00:00:00 2001
From: Anders <6058745+ddabble@users.noreply.github.com>
Date: Thu, 28 Sep 2023 18:38:32 +0200
Subject: [PATCH 2/2] Improved changelog for #1015

---
 CHANGES.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CHANGES.rst b/CHANGES.rst
index d683fc044..0279c0dca 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -14,7 +14,7 @@ Unreleased
   now allowed; history records will still be created (gh-1248)
 - Added temporary requirement on ``asgiref>=3.6`` while the minimum required Django
   version is lower than 4.2 (gh-1261)
-- Started using ``exists`` query instead of ``count`` in ``clean-duplicate_history`` command
+- Small performance optimization of the ``clean-duplicate_history`` command (gh-1015)
 
 3.4.0 (2023-08-18)
 ------------------