pip install pytest-benchmark statistics

benchmark.py

from __future__ import print_function

from xml.etree.ElementTree import Element, SubElement, ElementTree

from lxml.etree import Element as E
from lxml.etree import SubElement as SE
from lxml.etree import ElementTree as ET



def tree(f):
    # https://pymotw.com/2/xml/etree/ElementTree/create.html#serializing-xml-to-a-stream
    url = Element('url')
    loc = SubElement(url, 'loc')
    loc.text = u'https://calisphere.org/item/{0}/'.format('xxxxxxx')
    ElementTree(url).write(f)


def lxmltree(f):
    url = E('url')
    loc = SE (url, 'loc')
    loc.text = u'https://calisphere.org/item/{0}/'.format('xxxxxxx')
    ET(url).write(f)


def print_template(f):
    print(
        u'<url><loc>https://calisphere.org/item/{0}/</loc></url>'.format('xxxxxxx'),
        file=f, end=""
    )


def fwrite(f):
    f.write(u'<url><loc>https://calisphere.org/item/{0}/</loc></url>'.format('xxxxxxx'))


def test_etree(benchmark):
    with open('/dev/null', 'w+') as f:
        result = benchmark(tree, f)


def test_lxmletree(benchmark):
    with open('/dev/null', 'w+') as f:
        result = benchmark(lxmltree, f)


def test_print(benchmark):
    with open('/dev/null', 'w+') as f:
        result = benchmark(print_template, f)


def test_fwrite(benchmark):
    with open('/dev/null', 'w+') as f:
        result = benchmark(fwrite, f)

gistfile1.txt

py.test benchmark.py --benchmark-min-rounds 10000
=========================================================================== test session starts ===========================================================================
platform darwin -- Python 2.7.10, pytest-3.0.2, py-1.4.31, pluggy-0.3.1
benchmark: 3.0.0 (defaults: timer=time.time disable_gc=False min_rounds=10000 min_time=5.00us max_time=1.00s calibration_precision=10 warmup=False warmup_iterations=100000)
rootdir: /Users/btingle/workspace, inifile: 
plugins: benchmark-3.0.0
collected 4 items 

benchmark.py ....


------------------------------------------------------------------------------------- benchmark: 4 tests -------------------------------------------------------------------------------------
Name (time in ns)             Min                     Max                   Mean                StdDev                 Median                   IQR            Outliers(*)  Rounds  Iterations
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
test_print                 0.0000 (1.0)      141,859.0546 (1.31)      3,410.8497 (1.12)     1,305.5858 (1.0)       3,099.4415 (1.0)      1,192.0929 (5.00)         944;653   62602           1
test_fwrite            1,907.3486 (inf)      154,972.0764 (1.43)      3,036.4342 (1.0)      1,414.1164 (1.08)      3,099.4415 (1.0)        238.4186 (1.0)        448;11726   47663           1
test_lxmletree        12,874.6033 (inf)      108,003.6163 (1.0)      15,907.3114 (5.24)     3,420.1570 (2.62)     15,020.3705 (4.85)     2,861.0229 (12.00)        375;315   10000           1
test_etree            27,894.9738 (inf)      581,026.0773 (5.38)     32,045.5313 (10.55)    7,473.7609 (5.72)     30,040.7410 (9.69)     4,768.3716 (20.00)        349;263   10000           1
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

(*) Outliers: 1 Standard Deviation from Mean; 1.5 IQR (InterQuartile Range) from 1st Quartile and 3rd Quartile.
======================================================================== 4 passed in 4.57 seconds =========================================================================