Enable Ruff perflint (PERF) rules

.ruff.toml

@@ -128,7 +128,12 @@ select = [
     # pandas-vet ('PD')
       # Pandas is not used in Sphinx
     # perflint ('PERF')
-      # NOT YET USED
+    "PERF101",  # Do not cast an iterable to `list` before iterating over it
+    "PERF102",  # When using only the {subset} of a dict use the `{subset}()` method
+#    "PERF203",  # `try`-`except` within a loop incurs performance overhead
+#    "PERF401",  # Use a list comprehension to create a transformed list
+    "PERF402",  # Use `list` or `list.copy` to create a copy of a list
+    "PERF403",  # Use a dictionary comprehension instead of a for-loop
     # pygrep-hooks ('PGH')
     "PGH",
     # flake8-pie ('PIE')

sphinx/testing/fixtures.py

@@ -69,13 +69,12 @@ def app_params(request: Any, test_params: dict, shared_result: SharedResult,
 
     # ##### process pytest.mark.sphinx
 
-    pargs = {}
+    pargs: dict[int, Any] = {}
     kwargs: dict[str, Any] = {}
 
     # to avoid stacking positional args
     for info in reversed(list(request.node.iter_markers("sphinx"))):
-        for i, a in enumerate(info.args):
-            pargs[i] = a
+        pargs |= dict(enumerate(info.args))
         kwargs.update(info.kwargs)
 
     args = [pargs[i] for i in sorted(pargs.keys())]

tests/test_ext_apidoc.py

@@ -26,8 +26,7 @@ def apidoc_params(request):
     kwargs = {}
 
     for info in reversed(list(request.node.iter_markers("apidoc"))):
-        for i, a in enumerate(info.args):
-            pargs[i] = a
+        pargs |= dict(enumerate(info.args))
         kwargs.update(info.kwargs)
 
     args = [pargs[i] for i in sorted(pargs.keys())]

tests/test_ext_autosummary.py

@@ -154,7 +154,7 @@ def test_get_items_summary(make_app, app_params):
     def new_get_items(self, names, *args, **kwargs):
         results = orig_get_items(self, names, *args, **kwargs)
         for name, result in zip(names, results):
-            autosummary_items[name] = result
+            autosummary_items[name] = result  # NoQA: PERF403
         return results
 
     def handler(app, what, name, obj, options, lines):