The query select * from test limit 1; takes about 0.4 ms in psql using timing on, but the same query takes at least 4 ms in SQLAlchemy. Is it normal? I am using the following code to measure the execution time:

class Base(MappedAsDataclass, DeclarativeBase):
    pass


class Test(Base):
    __tablename__ = 'test'

    id: Mapped[int] = mapped_column(primary_key=True, init=False)
    date: Mapped[datetime]

database_url: URL = URL.create(
    drivername='postgresql+psycopg',
    username='foo',
    password='passwd',
    host='localhost',
    port=5432,
    database='mydb'
)
engine = create_engine(database_url, echo=True)
Base.metadata.drop_all(engine)
Base.metadata.create_all(engine)

with Session(engine) as session:
    tests = []
    for i in range(0, 10):
        tests.append(Test(date=datetime.now()))
    session.add_all(tests)
    session.commit()

    for i in range(5): # To warm up cache
        session.scalars(select(Test).limit(1))

    t = time.time()    
    session.scalars(select(Test).limit(1))
    print((time.time() - t) * 1000, ' ms')