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"""In this series of tests, we're looking at a method that inserts a row
within a distinct transaction, and afterwards returns to essentially a
"closed" state. This would be analogous to an API call that starts up
a database connection, inserts the row, commits and closes.
"""
from . import Profiler
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, create_engine, bindparam, pool
from sqlalchemy.orm import Session
Base = declarative_base()
engine = None
class Customer(Base):
__tablename__ = "customer"
id = Column(Integer, primary_key=True)
name = Column(String(255))
description = Column(String(255))
Profiler.init("single_inserts", num=10000)
@Profiler.setup
def setup_database(dburl, echo, num):
global engine
engine = create_engine(dburl, echo=echo)
if engine.dialect.name == 'sqlite':
engine.pool = pool.StaticPool(creator=engine.pool._creator)
Base.metadata.drop_all(engine)
Base.metadata.create_all(engine)
@Profiler.profile
def test_orm_commit(n):
"""Individual INSERT/COMMIT pairs via the ORM"""
for i in range(n):
session = Session(bind=engine)
session.add(
Customer(
name='customer name %d' % i,
description='customer description %d' % i)
)
session.commit()
@Profiler.profile
def test_bulk_save(n):
"""Individual INSERT/COMMIT pairs using the "bulk" API """
for i in range(n):
session = Session(bind=engine)
session.bulk_save_objects([
Customer(
name='customer name %d' % i,
description='customer description %d' % i
)])
session.commit()
@Profiler.profile
def test_bulk_insert_dictionaries(n):
"""Individual INSERT/COMMIT pairs using the "bulk" API with dictionaries"""
for i in range(n):
session = Session(bind=engine)
session.bulk_insert_mappings(Customer, [
dict(
name='customer name %d' % i,
description='customer description %d' % i
)])
session.commit()
@Profiler.profile
def test_core(n):
"""Individual INSERT/COMMIT pairs using Core."""
for i in range(n):
with engine.begin() as conn:
conn.execute(
Customer.__table__.insert(),
dict(
name='customer name %d' % i,
description='customer description %d' % i
)
)
@Profiler.profile
def test_core_query_caching(n):
"""Individual INSERT/COMMIT pairs using Core with query caching"""
cache = {}
ins = Customer.__table__.insert()
for i in range(n):
with engine.begin() as conn:
conn.execution_options(compiled_cache=cache).execute(
ins,
dict(
name='customer name %d' % i,
description='customer description %d' % i
)
)
@Profiler.profile
def test_dbapi_raw_w_connect(n):
"""Individual INSERT/COMMIT pairs w/ DBAPI + connection each time"""
_test_dbapi_raw(n, True)
@Profiler.profile
def test_dbapi_raw_w_pool(n):
"""Individual INSERT/COMMIT pairs w/ DBAPI + connection pool"""
_test_dbapi_raw(n, False)
def _test_dbapi_raw(n, connect):
compiled = Customer.__table__.insert().values(
name=bindparam('name'),
description=bindparam('description')).\
compile(dialect=engine.dialect)
if compiled.positional:
args = (
('customer name %d' % i, 'customer description %d' % i)
for i in range(n))
else:
args = (
dict(
name='customer name %d' % i,
description='customer description %d' % i
)
for i in range(n)
)
sql = str(compiled)
if connect:
for arg in args:
# there's no connection pool, so if these were distinct
# calls, we'd be connecting each time
conn = engine.pool._creator()
cursor = conn.cursor()
cursor.execute(sql, arg)
lastrowid = cursor.lastrowid
conn.commit()
conn.close()
else:
for arg in args:
conn = engine.raw_connection()
cursor = conn.cursor()
cursor.execute(sql, arg)
lastrowid = cursor.lastrowid
conn.commit()
conn.close()
if __name__ == '__main__':
Profiler.main()
|
