Created
November 12, 2012 19:29
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Pyquery, lxml, BeautifulSoup comparison
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from bs4 import BeautifulSoup as bs | |
from pyquery import PyQuery as pq | |
from lxml.html import fromstring | |
import re | |
import requests | |
import time | |
def Timer(): | |
a = time.time() | |
while True: | |
c = time.time() | |
yield time.time()-a | |
a = c | |
timer = Timer() | |
url = "http://www.python.org/" | |
html = requests.get(url).text | |
num = 100000 | |
print '\n==== Total trials: %s =====' %num | |
next(timer) | |
soup = bs(html, 'lxml') | |
for x in range(num): | |
paragraphs = soup.findAll('p') | |
t = next(timer) | |
print 'bs4 total time: %.1f' %t | |
d = pq(html) | |
for x in range(num): | |
paragraphs = d('p') | |
t = next(timer) | |
print 'pq total time: %.1f' %t | |
tree = fromstring(html) | |
for x in range(num): | |
paragraphs = tree.cssselect('p') | |
t = next(timer) | |
print 'lxml (cssselect) total time: %.1f' %t | |
tree = fromstring(html) | |
for x in range(num): | |
paragraphs = tree.xpath('.//p') | |
t = next(timer) | |
print 'lxml (xpath) total time: %.1f' %t | |
for x in range(num): | |
paragraphs = re.findall('<[p ]>.*?</p>', html) | |
t = next(timer) | |
print 'regex total time: %.1f (doesn\'t find all p)\n' %t |
I tried selectolax and in this case selectolax is 2 times faster than lxml
https://rushter.com/blog/python-fast-html-parser/
from selectolax.parser import HTMLParser
tree = HTMLParser(html)
for x in range(num):
paragraphs = tree.css('p')
t = next(timer)
print('selectolax total time: %.1f' % t)
==== Total trials: 100000 =====
bs4 total time: 95.4
pq total time: 10.9
lxml (cssselect) total time: 10.0
lxml (xpath) total time: 6.4
regex total time: 14.4 (doesn't find all p)
selectolax total time: 3.4
python 3.9.2
==== Total trials: 100000 =====
bs4 total time: 31.9
pq total time: 4.9
lxml (cssselect) total time: 4.4
lxml (xpath) total time: 3.1
regex total time: 8.5 (doesn't find all p)
Python 3.10.4
==== Total trials: 100000 =====
bs4 total time: 30.1
pq total time: 2.8
lxml (cssselect) total time: 2.6
lxml (xpath) total time: 2.0
regex total time: 6.3 (doesn't find all p)
Python 3.10.1
==== Total trials: 100000 =====
bs4 total time: 45.9
pq total time: 4.6
lxml (cssselect) total time: 4.3
lxml (xpath) total time: 3.3
regex total time: 8.4 (doesn't find all p)
Python 3.11.2
==== Total trials: 100000 =====
bs4 total time: 18.1
pq total time: 2.2
lxml (cssselect) total time: 2.2
lxml (xpath) total time: 1.7
regex total time: 5.2 (doesn't find all p)
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Results using python 3.7.3