component: use prefetch instead of all

The prefetch fetches categories needed to build full slug and defers
loading of huge fields like commit messages what both have positive
performance impacts.

weblate/memory/tasks.py

@@ -19,11 +19,11 @@ def import_memory(project_id: int, component_id: int | None = None):
 
     project = Project.objects.get(pk=project_id)
 
-    components = project.component_set.all()
+    components = project.component_set.prefetch()
     if component_id:
         components = components.filter(id=component_id)
 
-    for component in components.iterator():
+    for component in components:
         component.log_info("updating translation memory")
         with transaction.atomic():
             units = Unit.objects.filter(

weblate/memory/views.py

@@ -99,7 +99,9 @@ def form_valid(self, form):
         if origin:
             slugs = [origin]
         else:
-            slugs = [component.full_slug for component in project.component_set.all()]
+            slugs = [
+                component.full_slug for component in project.component_set.prefetch()
+            ]
         Memory.objects.filter(origin__in=slugs, shared=True).delete()
         # Rebuild memory in background
         import_memory.delay(project_id=project.id, component_id=component_id)
@@ -172,7 +174,7 @@ def get_url(slug: str) -> str:
         if "project" in self.objects:
             slugs = {
                 component.full_slug
-                for component in self.objects["project"].component_set.all()
+                for component in self.objects["project"].component_set.prefetch()
             }
             existing = {entry["origin"] for entry in result}
             for entry in result:

weblate/templates/browse.html

@@ -26,7 +26,7 @@
 {% block content %}
 
 {% if object.component.slug == "-" %}
-  {% for component in project.component_set.all %}
+  {% for component in project.component_set.prefetch %}
     {% include "snippets/component/state.html" with object=component %}
   {% endfor %}
 {% else %}

weblate/templates/zen.html

@@ -30,7 +30,7 @@
 {% block content %}
 
 {% if object.component.slug == "-" %}
-  {% for component in project.component_set.all %}
+  {% for component in project.component_set.prefetch %}
     {% include "snippets/component/state.html" with object=component %}
   {% endfor %}
 {% else %}