@author: icejoywoo
@date: 15/12/6
"""
import perf
def even_filter_lc():
""" list comprehension
"""
return [i for i in xrange(1000) if i % 2 == 0]
def even_filter_2():
""" built-in filter function
"""
return filter(lambda x: x % 2 == 0, xrange(1000))
def even_filter():
r = []
for i in xrange(1000):
if i % 2 == 0:
r.append(i)
return r
if __name__ == '__main__':
print perf.perf(even_filter)
print perf.perf(even_filter_2)
print perf.perf(even_filter_lc)
return d.get(k, None)
return wrapper
query = query_wrapper()
def query_wrapper_e():
d = [None]
def wrapper(k):
try:
return d[0].get(k, None)
except AttributeError:
d[0] = dict([line.split() for line in dict_string.split('\n')])
return d[0].get(k, None)
return wrapper
query_e = query_wrapper_e()
def test(f):
for k in 'ABCDEFG':
f(k)
if __name__ == '__main__':
print perf.perf(test, query)
print perf.perf(test, query_e)
for i in l:
if i not in words_tuple:
f.append(i)
return f
def in_dict():
f = []
for i in l:
if i not in words_dict:
f.append(i)
return f
def in_set():
f = []
for i in l:
if i not in words_set:
f.append(i)
return f
if __name__ == '__main__':
print perf.perf(in_string)
print perf.perf(in_list)
print perf.perf(in_tuple)
print perf.perf(in_dict)
print perf.perf(in_set)
#!/usr/bin/env python2.7
# encoding: utf-8
"""
@brief:
@author: icejoywoo
@date: 15/12/6
"""
import dis
import perf
def while_true():
while True:
break
def while_1():
while 1:
break
if __name__ == '__main__':
print perf.perf(while_true)
print perf.perf(while_1)
print dis.dis(while_true)
print dis.dis(while_1)
"""
import re
import perf
s = ("Note that there is a significant advantage in Python to adding a number "
"to itself instead of multiplying it by two or shifting it left by one bit. "
"In C on all modern computer architectures, each of the three arithmetic "
"operations are translated into a single machine instruction which executes "
"in one cycle, so it doesn't really matter which one you choose.")
words = re.split(r'\W', s)
def string_add():
r = ''
for w in words:
r += w + ' '
return r
def string_join():
return ' '.join(words)
if __name__ == '__main__':
print perf.perf(string_add)
print perf.perf(string_join)
#!/usr/bin/env python2.7
# encoding: utf-8
"""
@brief:
@author: icejoywoo
@date: 15/12/7
"""
import string
import perf
def lower_with_import():
import string
return string.lower('Python')
def lower_without_import():
return string.lower('Python')
if __name__ == '__main__':
print perf.perf(lower_with_import)
print perf.perf(lower_without_import)
#!/usr/bin/env python2.7
# encoding: utf-8
"""
@brief:
@author: icejoywoo
@date: 15/12/6
"""
import perf
if __name__ == '__main__':
print perf.perf(range, 10000)
print perf.perf(xrange, 10000)
r.append(upper(i))
return r
def upper_common_lc():
""" list comprehension
"""
return [str.upper(i) for i in s]
def upper_common_lc_2():
""" list comprehension
"""
return [i.upper() for i in s]
def upper_without_dots_lc():
""" list comprehension
"""
upper = str.upper
return [upper(i) for i in s]
if __name__ == '__main__':
print perf.perf(upper_common)
print perf.perf(upper_without_dots)
print perf.perf(upper_common_lc)
print perf.perf(upper_common_lc_2)
print perf.perf(upper_without_dots_lc)
