flask-restplus performance test

test.py

'''
Model.restricted optimalization

WITHOUT cached_property:
------------------------

PATH: '/test/'
         828222 function calls (682094 primitive calls) in 0.992 second

   Ordered by: internal time, call count
   List reduced from 207 to 10 due to restriction <10>
   
   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
118110/2001    0.344    0.000    0.814    0.000 /usr/local/lib/python3.6/copy.py:132(deepcopy)
4004/4001    0.093    0.000    0.490    0.000 /usr/local/lib/python3.6/copy.py:236(_deepcopy_dict)
   240238    0.091    0.000    0.091    0.000 {method 'get' of 'dict' objects}
   139131    0.043    0.000    0.043    0.000 {built-in method builtins.id}
4004/4001    0.038    0.000    0.617    0.000 /usr/local/lib/python3.6/copy.py:268(_reconstruct)
2002/2001    0.034    0.000    0.786    0.000 /home/vagrant/.venv/lib/python3.6/site-packages/flask_restplus/model.py:217(__deepcopy__)
   108100    0.028    0.000    0.028    0.000 /usr/local/lib/python3.6/copy.py:190(_deepcopy_atomic)
17035/3024    0.022    0.000    0.854    0.000 {built-in method builtins.getattr}
    10010    0.021    0.000    0.028    0.000 /usr/local/lib/python3.6/copy.py:252(_keep_alive)
     2002    0.021    0.000    0.021    0.000 /home/vagrant/.venv/lib/python3.6/site-packages/flask_restplus/model.py:38(__init__)


As you can see there is 2001 primitive calls for deepcopy. 
This number is equal to (2*n)+1 where n is a number of elements on nested List.


WITH cached_property:
---------------------

PATH: '/test/'
         112941 function calls (96683 primitive calls) in 0.129 seconds

   Ordered by: internal time, call count
   List reduced from 207 to 10 due to restriction <10>

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
24009/12009    0.015    0.000    0.027    0.000 /usr/local/lib/python3.6/json/encoder.py:333(_iterencode_dict)
   1001/1    0.014    0.000    0.088    0.088 /home/vagrant/.venv/lib/python3.6/site-packages/flask_restplus/marshalling.py:13(marshal)
   3002/2    0.009    0.000    0.086    0.043 /home/vagrant/.venv/lib/python3.6/site-packages/flask_restplus/marshalling.py:52(<genexpr>)
    19081    0.008    0.000    0.008    0.000 {built-in method builtins.isinstance}
     6025    0.008    0.000    0.008    0.000 {built-in method builtins.hasattr}
    12003    0.008    0.000    0.023    0.000 /usr/local/lib/python3.6/json/encoder.py:277(_iterencode_list)
     3001    0.007    0.000    0.034    0.000 /home/vagrant/.venv/lib/python3.6/site-packages/flask_restplus/fields.py:41(get_value)
     3001    0.006    0.000    0.018    0.000 /home/vagrant/.venv/lib/python3.6/site-packages/flask_restplus/fields.py:59(_get_value_for_key)
     2000    0.005    0.000    0.036    0.000 /home/vagrant/.venv/lib/python3.6/site-packages/flask_restplus/fields.py:139(output)
    12009    0.005    0.000    0.032    0.000 /usr/local/lib/python3.6/json/encoder.py:412(_iterencode)

'''



from flask import Flask
from flask_restplus import Api, Resource, fields, Model
from werkzeug.contrib.profiler import ProfilerMiddleware

app = Flask(__name__)

api = Api(version='1.0', title='Test')

ns = api.namespace('test')

test_element = api.model('Element', {
    'a': fields.Integer(),
    'b': fields.String(),
})

test_list = api.model('TestList', {
    'data': fields.List(fields.Nested(test_element))
})


@ns.route('/')
class TestCollection(Resource):
    @api.marshal_list_with(test_list)
    def get(self):
        return {
            'data': [
                {'a': x, 'b': x}
                for x in range(0, 1000)
            ]
        }


if __name__ == '__main__':
    app.config['PROFILE'] = True
    app.wsgi_app = ProfilerMiddleware(app.wsgi_app, restrictions=(10, ))

    api.init_app(app)
    api.add_namespace(ns)
    app.run(host='0.0.0.0', debug=True)