Альтернатива merge в sqlalchemy ?

from sqlalchemy import create_engine, ForeignKey, Table
from sqlalchemy import Column, Date, Integer, String, DateTime, BigInteger, event
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.engine import Engine
from sqlalchemy.orm import relationship, backref, sessionmaker, scoped_session, Session

class Test(declarative_base()):
    __tablename__ = "Test"
    def __init__(self, *args, **kwargs):
        args = args[0]
        for key in args:
            setattr(self, key, args[key] )
    key = Column(String, primary_key=True)

data = []
for a in range(0,10000):
    data.append({ "key" : "key%s" % a})


engine = create_engine("sqlite:///testn", echo=False)
with engine.connect() as connection:
    Test.metadata.create_all(engine)
    session = Session(engine)
    list(map(lambda x: session.merge(Test(x)), data))
    session.commit()

real    0m15.300s
user    0m14.920s
sys     0m0.351s

from peewee import *

class Test(Model):
    key = TextField(primary_key=True,null=False)

dbname = "test"
db = SqliteDatabase(dbname)
Test._meta.database = db
data = []
for a in range(0,10000):
    data.append({ "key" : "key%s" % a })

if not Test.table_exists():
    db.create_tables([Test])
with db.atomic() as tr:
        Test.insert_many(data).upsert().execute()

real    0m3.253s
user    0m2.620s
sys     0m0.571s