getrusage returns platform-dependent value

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-05-30.17:01:18.997>
labels = ['3.7', 'type-bug', 'library']
title = 'getrusage returns platform-dependent value'
updated_at = <Date 2017-05-30.17:16:22.181>
user = 'https://github.com/sam-s'

bugs.python.org fields:

activity = <Date 2017-05-30.17:16:22.181>
actor = 'sam-s'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2017-05-30.17:01:18.997>
creator = 'sam-s'
dependencies = []
files = []
hgrepos = []
issue_num = 30513
keywords = []
message_count = 2.0
messages = ['294768', '294769']
nosy_count = 1.0
nosy_names = ['sam-s']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue30513'
versions = ['Python 2.7', 'Python 3.3', 'Python 3.4', 'Python 3.5', 'Python 3.6', 'Python 3.7']