⚡️ Speed up method BaseModelAdminChecks._check_autocomplete_fields by 7%

[codeflash-ai]

📄 7% (0.07x) speedup for BaseModelAdminChecks._check_autocomplete_fields in django/contrib/admin/checks.py

⏱️ Runtime : 2.54 milliseconds → 2.38 milliseconds (best of 154 runs)

📝 Explanation and details

Optimization notes:

• Replaces the comprehension+chain combo in _check_autocomplete_fields with a direct for loop for much better performance and memory efficiency (removes the creation of an intermediate list of results, and avoids the relatively expensive chain.from_iterable). This is an especially big win because the vast majority of calls in typical Django admin usage result in [] (which now will not allocate spurious empty lists).
• Localizes errors.append as append_error for tight-loop micro-optimization (minor but relevant in hot paths).
• Slight clarification in logic order in _check_autocomplete_fields_item to avoid unnecessary code path indirections.
• All existing function signatures/type comments and behavioral logic are preserved exactly as required.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 58 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	100.0%

🌀 Generated Regression Tests and Runtime

from itertools import chain

# imports
import pytest  # used for our unit tests
from django.contrib.admin.checks import BaseModelAdminChecks
# function to test
from django.contrib.admin.exceptions import NotRegistered
from django.core import checks
from django.core.exceptions import FieldDoesNotExist
from django.db import models

# --- Unit Test Setup ---

# Minimal Django model and admin mocks for testing
class FakeField:
    def __init__(self, name, many_to_many=False, is_fk=False, remote_model=None):
        self.name = name
        self.many_to_many = many_to_many
        self.remote_field = type("RemoteField", (), {})()
        self.remote_field.model = remote_model
        self.__class__ = models.ForeignKey if is_fk else models.Field

class FakeMeta:
    def __init__(self, fields, label="app.Model"):
        self._fields = {f.name: f for f in fields}
        self.label = label
    def get_field(self, name):
        if name not in self._fields:
            raise FieldDoesNotExist()
        return self._fields[name]

class FakeModel:
    def __init__(self, fields, label="app.Model"):
        self._meta = FakeMeta(fields, label)
        self.__name__ = label.split('.')[-1]

class FakeAdminSite:
    def __init__(self, registry):
        self._registry = registry  # dict of model: admin
    def get_model_admin(self, model):
        if model not in self._registry:
            raise NotRegistered()
        return self._registry[model]

class FakeModelAdmin:
    def __init__(self, model, autocomplete_fields, admin_site):
        self.model = model
        self.autocomplete_fields = autocomplete_fields
        self.admin_site = admin_site

# Related admin mock with search_fields
class RelatedAdmin:
    def __init__(self, search_fields):
        self.search_fields = search_fields

# --- Test Cases ---

@pytest.fixture
def base_checks():
    return BaseModelAdminChecks()

# --- 1. Basic Test Cases ---

def test_autocomplete_fields_is_list_of_valid_fk(base_checks):
    # Setup: Model with FK field, related admin has search_fields
    related_model = FakeModel([], label="app.Related")
    fk_field = FakeField("rel", is_fk=True, remote_model=related_model)
    main_model = FakeModel([fk_field], label="app.Main")
    admin_site = FakeAdminSite({related_model: RelatedAdmin(["name"])})
    admin = FakeModelAdmin(main_model, ["rel"], admin_site)
    # Should return empty list (no errors)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 4.94μs -> 3.67μs (34.6% faster)

def test_autocomplete_fields_is_tuple_of_valid_m2m(base_checks):
    # Setup: Model with M2M field, related admin has search_fields
    related_model = FakeModel([], label="app.Related")
    m2m_field = FakeField("tags", many_to_many=True, remote_model=related_model)
    main_model = FakeModel([m2m_field], label="app.Main")
    admin_site = FakeAdminSite({related_model: RelatedAdmin(["tag"])})
    admin = FakeModelAdmin(main_model, ("tags",), admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 4.42μs -> 3.23μs (37.2% faster)

def test_autocomplete_fields_not_list_or_tuple(base_checks):
    # Setup: autocomplete_fields is not a list/tuple
    main_model = FakeModel([], label="app.Main")
    admin_site = FakeAdminSite({})
    admin = FakeModelAdmin(main_model, "notalist", admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 4.69μs -> 4.87μs (3.58% slower)

def test_autocomplete_fields_refers_to_missing_field(base_checks):
    # Setup: autocomplete_fields refers to non-existent field
    main_model = FakeModel([], label="app.Main")
    admin_site = FakeAdminSite({})
    admin = FakeModelAdmin(main_model, ["missing"], admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 8.05μs -> 6.92μs (16.3% faster)

def test_autocomplete_fields_field_not_fk_or_m2m(base_checks):
    # Setup: autocomplete_fields refers to a regular field
    field = FakeField("name", is_fk=False, many_to_many=False)
    main_model = FakeModel([field], label="app.Main")
    admin_site = FakeAdminSite({})
    admin = FakeModelAdmin(main_model, ["name"], admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 7.20μs -> 6.32μs (13.9% faster)

def test_autocomplete_fields_related_admin_not_registered(base_checks):
    # Setup: autocomplete_fields refers to FK, but related admin not registered
    related_model = FakeModel([], label="app.Related")
    fk_field = FakeField("rel", is_fk=True, remote_model=related_model)
    main_model = FakeModel([fk_field], label="app.Main")
    admin_site = FakeAdminSite({})  # No related admin
    admin = FakeModelAdmin(main_model, ["rel"], admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 7.90μs -> 7.25μs (9.10% faster)

def test_autocomplete_fields_related_admin_missing_search_fields(base_checks):
    # Setup: autocomplete_fields refers to FK, related admin has no search_fields
    related_model = FakeModel([], label="app.Related")
    fk_field = FakeField("rel", is_fk=True, remote_model=related_model)
    main_model = FakeModel([fk_field], label="app.Main")
    admin_site = FakeAdminSite({related_model: RelatedAdmin([])})
    admin = FakeModelAdmin(main_model, ["rel"], admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 7.54μs -> 6.60μs (14.4% faster)

# --- 2. Edge Test Cases ---

def test_autocomplete_fields_empty_list(base_checks):
    # Setup: autocomplete_fields is an empty list
    main_model = FakeModel([], label="app.Main")
    admin_site = FakeAdminSite({})
    admin = FakeModelAdmin(main_model, [], admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 2.08μs -> 1.22μs (70.3% faster)

def test_autocomplete_fields_mixed_valid_and_invalid_fields(base_checks):
    # Setup: autocomplete_fields contains valid FK and invalid field
    related_model = FakeModel([], label="app.Related")
    fk_field = FakeField("rel", is_fk=True, remote_model=related_model)
    invalid_field = FakeField("name", is_fk=False, many_to_many=False)
    main_model = FakeModel([fk_field, invalid_field], label="app.Main")
    admin_site = FakeAdminSite({related_model: RelatedAdmin(["name"])})
    admin = FakeModelAdmin(main_model, ["rel", "name", "missing"], admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 12.1μs -> 11.4μs (6.47% faster)
    error_ids = [e.id for e in errors]

def test_autocomplete_fields_with_duplicate_fields(base_checks):
    # Setup: autocomplete_fields contains duplicate valid FK fields
    related_model = FakeModel([], label="app.Related")
    fk_field = FakeField("rel", is_fk=True, remote_model=related_model)
    main_model = FakeModel([fk_field], label="app.Main")
    admin_site = FakeAdminSite({related_model: RelatedAdmin(["name"])})
    admin = FakeModelAdmin(main_model, ["rel", "rel"], admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 5.15μs -> 4.02μs (28.2% faster)


def test_autocomplete_fields_with_non_string_field_names(base_checks):
    # Setup: autocomplete_fields contains non-string field names (should raise missing field error)
    main_model = FakeModel([], label="app.Main")
    admin_site = FakeAdminSite({})
    admin = FakeModelAdmin(main_model, [123, None], admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 11.8μs -> 11.0μs (7.32% faster)
    for error in errors:
        pass

# --- 3. Large Scale Test Cases ---

def test_autocomplete_fields_large_number_of_valid_fields(base_checks):
    # Setup: Model with 500 FK fields, all registered admins with search_fields
    n = 500
    related_models = [FakeModel([], label=f"app.Related{i}") for i in range(n)]
    fk_fields = [FakeField(f"rel{i}", is_fk=True, remote_model=related_models[i]) for i in range(n)]
    main_model = FakeModel(fk_fields, label="app.Main")
    admin_site = FakeAdminSite({m: RelatedAdmin(["name"]) for m in related_models})
    admin = FakeModelAdmin(main_model, [f"rel{i}" for i in range(n)], admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 267μs -> 234μs (14.1% faster)

def test_autocomplete_fields_large_number_with_some_invalid(base_checks):
    # Setup: 500 fields, 10 are invalid (missing), rest are valid FK
    n = 500
    related_models = [FakeModel([], label=f"app.Related{i}") for i in range(n)]
    fk_fields = [FakeField(f"rel{i}", is_fk=True, remote_model=related_models[i]) for i in range(n)]
    main_model = FakeModel(fk_fields, label="app.Main")
    admin_site = FakeAdminSite({m: RelatedAdmin(["name"]) for m in related_models})
    # Add 10 missing fields
    autocomplete_fields = [f"rel{i}" for i in range(n)] + [f"missing{i}" for i in range(10)]
    admin = FakeModelAdmin(main_model, autocomplete_fields, admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 287μs -> 254μs (13.0% faster)
    for error in errors:
        pass

def test_autocomplete_fields_large_number_all_invalid_type(base_checks):
    # Setup: autocomplete_fields is a string instead of list/tuple (large string)
    main_model = FakeModel([], label="app.Main")
    admin_site = FakeAdminSite({})
    admin = FakeModelAdmin(main_model, "rel" * 100, admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 4.80μs -> 4.71μs (2.04% faster)

def test_autocomplete_fields_large_number_of_m2m_fields_missing_search_fields(base_checks):
    # Setup: 200 M2M fields, related admins missing search_fields
    n = 200
    related_models = [FakeModel([], label=f"app.Related{i}") for i in range(n)]
    m2m_fields = [FakeField(f"tag{i}", many_to_many=True, remote_model=related_models[i]) for i in range(n)]
    main_model = FakeModel(m2m_fields, label="app.Main")
    admin_site = FakeAdminSite({m: RelatedAdmin([]) for m in related_models})  # No search_fields
    admin = FakeModelAdmin(main_model, [f"tag{i}" for i in range(n)], admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 281μs -> 270μs (3.94% faster)
    for error in errors:
        pass

def test_autocomplete_fields_large_number_of_fields_with_mixed_errors(base_checks):
    # Setup: 100 fields, 30 missing, 30 not FK/M2M, 40 valid
    n = 100
    valid_related_models = [FakeModel([], label=f"app.Related{i}") for i in range(40)]
    fk_fields = [FakeField(f"rel{i}", is_fk=True, remote_model=valid_related_models[i]) for i in range(40)]
    invalid_fields = [FakeField(f"name{i}", is_fk=False, many_to_many=False) for i in range(30)]
    main_model = FakeModel(fk_fields + invalid_fields, label="app.Main")
    admin_site = FakeAdminSite({m: RelatedAdmin(["name"]) for m in valid_related_models})
    autocomplete_fields = [f"rel{i}" for i in range(40)] + [f"name{i}" for i in range(30)] + [f"missing{i}" for i in range(30)]
    admin = FakeModelAdmin(main_model, autocomplete_fields, admin_site)
    codeflash_output = base_checks._check_autocomplete_fields(admin); errors = codeflash_output # 110μs -> 103μs (6.89% faster)
    # Should have 30 missing field errors and 30 not FK/M2M errors
    error_ids = [e.id for e in errors]
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.
#------------------------------------------------
from itertools import chain
from types import SimpleNamespace

# imports
import pytest  # used for our unit tests
from django.contrib.admin.checks import BaseModelAdminChecks
# function to test
from django.contrib.admin.exceptions import NotRegistered
from django.core import checks
from django.core.exceptions import FieldDoesNotExist
from django.db import models

# --- Minimal Django model and admin site mocks for testing ---

class DummyField:
    """A minimal stand-in for Django model fields."""
    def __init__(self, name, many_to_many=False, is_fk=False, remote_model=None):
        self.name = name
        self.many_to_many = many_to_many
        if is_fk:
            self.remote_field = SimpleNamespace(model=remote_model)
        elif many_to_many:
            self.remote_field = SimpleNamespace(model=remote_model)
        else:
            self.remote_field = None

class DummyMeta:
    """A minimal stand-in for Django's _meta API."""
    def __init__(self, fields):
        self.fields = {f.name: f for f in fields}
        self.label = "app.Model"

    def get_field(self, name):
        if name not in self.fields:
            raise FieldDoesNotExist(name)
        return self.fields[name]

class DummyModel:
    """A minimal stand-in for a Django model class."""
    def __init__(self, fields):
        self._meta = DummyMeta(fields)

class DummyAdminSite:
    """A minimal stand-in for Django's admin site registry."""
    def __init__(self):
        self._registry = {}

    def register(self, model, admin):
        self._registry[model] = admin

    def get_model_admin(self, model):
        if model not in self._registry:
            raise NotRegistered(model)
        return self._registry[model]

# Dummy ForeignKey class for isinstance checks in our test harness
class DummyForeignKey(DummyField):
    def __init__(self, name, remote_model):
        super().__init__(name, many_to_many=False, is_fk=True, remote_model=remote_model)

# Dummy ManyToManyField class for isinstance checks in our test harness
class DummyManyToManyField(DummyField):
    def __init__(self, name, remote_model):
        super().__init__(name, many_to_many=True, is_fk=False, remote_model=remote_model)

# Dummy ModelAdmin for testing
class DummyModelAdmin:
    def __init__(self, model, admin_site, autocomplete_fields=None, search_fields=None):
        self.model = model
        self.admin_site = admin_site
        self.autocomplete_fields = autocomplete_fields if autocomplete_fields is not None else []
        self.search_fields = search_fields if search_fields is not None else []

# --- Unit Tests ---

@pytest.fixture
def base_admin_checks():
    """Fixture to provide a fresh BaseModelAdminChecks instance for each test."""
    return BaseModelAdminChecks()

@pytest.fixture
def admin_site():
    """Fixture to provide a fresh DummyAdminSite for each test."""
    return DummyAdminSite()

# ------------------ BASIC TEST CASES ------------------

def test_autocomplete_fields_valid_foreignkey(base_admin_checks, admin_site):
    """Test with a valid ForeignKey field in autocomplete_fields."""
    RelatedModel = type("RelatedModel", (), {})
    model_fields = [DummyForeignKey("rel", RelatedModel)]
    model = DummyModel(model_fields)
    related_admin = DummyModelAdmin(model=RelatedModel, admin_site=admin_site, search_fields=["name"])
    admin_site.register(RelatedModel, related_admin)
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=["rel"])
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 7.00μs -> 6.14μs (14.0% faster)

def test_autocomplete_fields_valid_manytomany(base_admin_checks, admin_site):
    """Test with a valid ManyToMany field in autocomplete_fields."""
    RelatedModel = type("RelatedModel", (), {})
    model_fields = [DummyManyToManyField("rel_m2m", RelatedModel)]
    model = DummyModel(model_fields)
    related_admin = DummyModelAdmin(model=RelatedModel, admin_site=admin_site, search_fields=["desc"])
    admin_site.register(RelatedModel, related_admin)
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=["rel_m2m"])
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 4.03μs -> 3.04μs (32.6% faster)

def test_autocomplete_fields_empty_list(base_admin_checks, admin_site):
    """Test with an empty autocomplete_fields list."""
    model = DummyModel([])
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=[])
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 2.22μs -> 1.25μs (77.3% faster)

# ------------------ EDGE TEST CASES ------------------

def test_autocomplete_fields_not_list_or_tuple(base_admin_checks, admin_site):
    """Test when autocomplete_fields is not a list or tuple."""
    model = DummyModel([])
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields="notalist")
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 4.45μs -> 4.64μs (4.03% slower)

def test_autocomplete_fields_missing_field(base_admin_checks, admin_site):
    """Test when autocomplete_fields refers to a nonexistent field."""
    model = DummyModel([])
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=["missing"])
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 8.21μs -> 6.99μs (17.5% faster)

def test_autocomplete_fields_non_relational_field(base_admin_checks, admin_site):
    """Test when autocomplete_fields refers to a non-relational field."""
    # Simulate a CharField (not FK or M2M)
    class DummyCharField(DummyField):
        pass
    model_fields = [DummyCharField("nonrel")]
    model = DummyModel(model_fields)
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=["nonrel"])
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 7.55μs -> 6.63μs (13.7% faster)

def test_autocomplete_fields_admin_not_registered(base_admin_checks, admin_site):
    """Test when the related model admin is not registered."""
    RelatedModel = type("RelatedModel", (), {})
    model_fields = [DummyForeignKey("rel", RelatedModel)]
    model = DummyModel(model_fields)
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=["rel"])
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 7.14μs -> 6.26μs (14.1% faster)

def test_autocomplete_fields_related_admin_missing_search_fields(base_admin_checks, admin_site):
    """Test when the related admin is registered but has no search_fields."""
    RelatedModel = type("RelatedModel", (), {})
    model_fields = [DummyForeignKey("rel", RelatedModel)]
    model = DummyModel(model_fields)
    related_admin = DummyModelAdmin(model=RelatedModel, admin_site=admin_site, search_fields=[])
    admin_site.register(RelatedModel, related_admin)
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=["rel"])
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 7.09μs -> 6.30μs (12.4% faster)

def test_autocomplete_fields_tuple_input(base_admin_checks, admin_site):
    """Test that a tuple is accepted as autocomplete_fields."""
    RelatedModel = type("RelatedModel", (), {})
    model_fields = [DummyForeignKey("rel", RelatedModel)]
    model = DummyModel(model_fields)
    related_admin = DummyModelAdmin(model=RelatedModel, admin_site=admin_site, search_fields=["name"])
    admin_site.register(RelatedModel, related_admin)
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=("rel",))
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 7.22μs -> 6.38μs (13.3% faster)

def test_autocomplete_fields_multiple_fields_mixed(base_admin_checks, admin_site):
    """Test multiple fields with a mix of valid and invalid entries."""
    RelatedModel = type("RelatedModel", (), {})
    model_fields = [
        DummyForeignKey("rel1", RelatedModel),
        DummyManyToManyField("rel2", RelatedModel),
        DummyField("nonrel"),
    ]
    model = DummyModel(model_fields)
    related_admin = DummyModelAdmin(model=RelatedModel, admin_site=admin_site, search_fields=["name"])
    admin_site.register(RelatedModel, related_admin)
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=["rel1", "rel2", "nonrel", "missing"])
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 13.0μs -> 12.5μs (3.93% faster)

# ------------------ LARGE SCALE TEST CASES ------------------

def test_autocomplete_fields_large_number_of_valid_fields(base_admin_checks, admin_site):
    """Test with a large number of valid ForeignKey fields."""
    RelatedModel = type("RelatedModel", (), {})
    num_fields = 100
    model_fields = [DummyForeignKey(f"rel{i}", RelatedModel) for i in range(num_fields)]
    model = DummyModel(model_fields)
    related_admin = DummyModelAdmin(model=RelatedModel, admin_site=admin_site, search_fields=["name"])
    admin_site.register(RelatedModel, related_admin)
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=[f"rel{i}" for i in range(num_fields)])
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 130μs -> 124μs (4.16% faster)

def test_autocomplete_fields_large_number_with_some_invalid(base_admin_checks, admin_site):
    """Test with a large number of fields, some invalid."""
    RelatedModel = type("RelatedModel", (), {})
    num_fields = 50
    model_fields = [DummyForeignKey(f"rel{i}", RelatedModel) for i in range(num_fields)]
    # Add some non-relational fields
    model_fields += [DummyField(f"nonrel{i}") for i in range(5)]
    model = DummyModel(model_fields)
    related_admin = DummyModelAdmin(model=RelatedModel, admin_site=admin_site, search_fields=["name"])
    admin_site.register(RelatedModel, related_admin)
    autocomplete_fields = [f"rel{i}" for i in range(num_fields)] + [f"nonrel{i}" for i in range(5)] + ["missing1", "missing2"]
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=autocomplete_fields)
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 77.0μs -> 75.7μs (1.71% faster)
    nonrel_errors = [e for e in errors if e.id == "admin.E038"]
    missing_errors = [e for e in errors if e.id == "admin.E037"]

def test_autocomplete_fields_performance_with_just_under_1000(base_admin_checks, admin_site):
    """Test performance/scalability with just under 1000 fields."""
    RelatedModel = type("RelatedModel", (), {})
    num_fields = 999
    model_fields = [DummyForeignKey(f"rel{i}", RelatedModel) for i in range(num_fields)]
    model = DummyModel(model_fields)
    related_admin = DummyModelAdmin(model=RelatedModel, admin_site=admin_site, search_fields=["name"])
    admin_site.register(RelatedModel, related_admin)
    obj = DummyModelAdmin(model=model, admin_site=admin_site, autocomplete_fields=[f"rel{i}" for i in range(num_fields)])
    codeflash_output = base_admin_checks._check_autocomplete_fields(obj); errors = codeflash_output # 1.24ms -> 1.19ms (4.49% faster)
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

To edit these changes git checkout codeflash/optimize-BaseModelAdminChecks._check_autocomplete_fields-mgsqh7ce and push.