memory_usage_dict_vs_namedtuple_vs_ordereddict

In [3]: import collections

In [4]: import anyconfig

In [5]: ips = anyconfig.load("/tmp/fleure-tests-ouZIjr/packages.json")["data"]

In [6]: ips[0]
Out[6]:
{u'arch': u'x86_64',
 u'buildhost': u'x86-007.build.bos.redhat.com',
 u'epoch': 12,
 u'id': u'0020d156c85b2e2377ea0b8ffc00b3bd4c4a5012',
 u'name': u'dhclient',
 u'origin': u'redhat',
 u'rebuilt': False,
 u'release': u'34.P1.el6_4.1',
 u'replaced': False,
 u'summary': u'Provides the dhclient ISC DHCP client daemon and dhclient-script',
 u'vendor': u'Red Hat, Inc.',
 u'version': u'4.1.1'}

In [7]: # ...              
In [8]: NEVRA = collections.namedtuple("NEVRA", "name epoch version release arch")

In [9]: make_nevra = lambda p: NEVRA(*(p[k] for k in "name epoch version release arch".split()))

In [10]: %memit [make_nevra(p) for p in ips]
peak memory: 38.29 MiB, increment: 0.15 MiB

In [11]: make_nevra_dict = lambda p: dict((k, v) for k, v in p.items())

In [12]: %memit [make_nevra_dict(p) for p in ips]
peak memory: 38.31 MiB, increment: 0.00 MiB

In [13]: # ...

In [14]: %memit [[make_nevra_dict(p) for p in ips] for _ in range(1000)]
peak memory: 457.00 MiB, increment: 418.69 MiB

In [15]: %memit [[make_nevra(p) for p in ips] for _ in range(1000)]
peak memory: 384.84 MiB, increment: 39.76 MiB

In [16]: make_nevra_odict = lambda p: collections.OrderedDict((k, v) for k, v in p.items())

In [17]: %memit [[make_nevra_odict(p) for p in ips] for _ in range(1000)]
peak memory: 1573.24 MiB, increment: 1227.63 MiB

In [18]: