Improve save_playlist performance

app/models.py

@@ -306,7 +306,8 @@ class Playlists(Base):
         """Returns a list of all playlists ordered by last use"""
 
         return (
-            session.query(cls).order_by(cls.last_used.desc())
+            session.query(cls).order_by(
+                cls.loaded.desc(), cls.last_used.desc())
         ).all()
 
     @classmethod

app/music.py

@@ -153,14 +153,20 @@ class Music:
         with lock:
             return self.player.set_time(ms)
 
-    def set_volume(self, volume):
-        """Set maximum volume used for player"""
+    def set_volume(self, volume, set_default=True):
+        """
+        Set maximum volume used for player
+
+        Update default volume if set_default == True
+        """
 
         with lock:
             if not self.player:
                 return
 
+            if set_default:
                 self.max_volume = volume
+
             self.player.audio_set_volume(volume)
 
     def stop(self):

app/musicmuster.py

@@ -314,9 +314,9 @@ class Window(QMainWindow, Ui_MainWindow):
         """Drop music level by 3db if button checked"""
 
         if self.btnDrop3db.isChecked():
-            self.music.set_volume(Config.VOLUME_VLC_DROP3db)
+            self.music.set_volume(Config.VOLUME_VLC_DROP3db, set_default=False)
         else:
-            self.music.set_volume(Config.VOLUME_VLC_DEFAULT)
+            self.music.set_volume(Config.VOLUME_VLC_DEFAULT, set_default=False)
 
     def enable_play_next_controls(self) -> None:
         """

poetry.lock

@@ -171,6 +171,20 @@ parso = ">=0.8.0,<0.9.0"
 qa = ["flake8 (==3.8.3)", "mypy (==0.782)"]
 testing = ["Django (<3.1)", "colorama", "docopt", "pytest (<7.0.0)"]
 
+[[package]]
+name = "line-profiler"
+version = "3.5.1"
+description = "Line-by-line profiler."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[package.extras]
+all = ["cython", "scikit-build", "cmake", "ninja", "pytest (>=4.6.11)", "pytest-cov (>=2.10.1)", "coverage[toml] (>=5.3)", "ubelt (>=1.0.1)", "IPython (>=0.13,<7.17.0)", "IPython (>=0.13)"]
+build = ["cython", "scikit-build", "cmake", "ninja"]
+ipython = ["IPython (>=0.13,<7.17.0)", "IPython (>=0.13)"]
+tests = ["pytest (>=4.6.11)", "pytest-cov (>=2.10.1)", "coverage[toml] (>=5.3)", "ubelt (>=1.0.1)", "IPython (>=0.13,<7.17.0)", "IPython (>=0.13)"]
+
 [[package]]
 name = "mako"
 version = "1.2.0"
@@ -614,7 +628,7 @@ python-versions = "*"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "32b91fc8cb421cc92689db4fc1a4647044714d6e2a72194fe7caf2e25c821b55"
+content-hash = "d914be2982394dfeb0dc14962dfabc4474f1daaafcbc93c57fcaad6172fd8597"
 
 [metadata.files]
 alembic = [
@@ -725,6 +739,7 @@ jedi = [
     {file = "jedi-0.18.1-py2.py3-none-any.whl", hash = "sha256:637c9635fcf47945ceb91cd7f320234a7be540ded6f3e99a50cb6febdfd1ba8d"},
     {file = "jedi-0.18.1.tar.gz", hash = "sha256:74137626a64a99c8eb6ae5832d99b3bdd7d29a3850fe2aa80a4126b2a7d949ab"},
 ]
+line-profiler = []
 mako = [
     {file = "Mako-1.2.0-py3-none-any.whl", hash = "sha256:23aab11fdbbb0f1051b93793a58323ff937e98e34aece1c4219675122e57e4ba"},
     {file = "Mako-1.2.0.tar.gz", hash = "sha256:9a7c7e922b87db3686210cf49d5d767033a41d4010b284e747682c92bddd8b39"},

pyproject.toml

@@ -26,6 +26,7 @@ PyQt5-stubs = "^5.15.2"
 mypy = "^0.931"
 pytest = "^7.0.1"
 pytest-qt = "^4.0.2"
+line-profiler = "^3.5.1"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]