Optimize Model insertions (blist + bisect)

requirements.txt

@@ -9,5 +9,6 @@ lxml           >= 4.4.2, < 5
 mistune        >= 0.8.4, < 0.9
 dataclasses    >= 0.6,   < 0.7; python_version < "3.7"
 pyfastcopy     >= 1.0.3, < 2;   python_version < "3.8"
+blist          >= 1.3.6, < 2
 
 git+http://github.com/mirukan/matrix-nio#egg=matrix-nio[e2e]

src/backend/models/model.py

@@ -1,8 +1,11 @@
 # SPDX-License-Identifier: LGPL-3.0-or-later
 
-from threading import Lock
+from bisect import bisect
+from threading import RLock
 from typing import TYPE_CHECKING, Any, Dict, Iterator, List, MutableMapping
 
+from blist import blist
+
 from ..pyotherside_events import (
     ModelCleared, ModelItemDeleted, ModelItemInserted,
 )
@@ -34,8 +37,8 @@ class Model(MutableMapping):
     def __init__(self, sync_id: SyncId) -> None:
         self.sync_id:      SyncId                 = sync_id
         self._data:        Dict[Any, "ModelItem"] = {}
-        self._sorted_data: List["ModelItem"]      = []
-        self._write_lock:  Lock                   = Lock()
+        self._sorted_data: List["ModelItem"]      = blist()
+        self._write_lock:  RLock                  = RLock()
 
 
     def __repr__(self) -> str:
@@ -85,10 +88,10 @@ class Model(MutableMapping):
             new.parent_model = self
 
             self._data[key] = new
-            self._sorted_data.append(new)
-            self._sorted_data.sort()
+            index           = bisect(self._sorted_data, new)
+            self._sorted_data.insert(index, new)
 
-            ModelItemInserted(self.sync_id, self._sorted_data.index(new), new)
+            ModelItemInserted(self.sync_id, index, new)
 
 
     def __delitem__(self, key) -> None:

src/backend/models/model_item.py

@@ -35,6 +35,7 @@ class ModelItem:
         if getattr(self, name) == value:
             return
 
+        with self.parent_model._write_lock:
             super().__setattr__(name, value)
 
             old_index = self.parent_model._sorted_data.index(self)