Created
December 19, 2011 02:50
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list2str
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import timeit | |
def f1(list): | |
string = "" | |
for item in list: | |
string = string + chr(item) | |
return string | |
def f2(list): | |
return reduce(lambda string, item: string + chr(item), list, "") | |
def f3(list): | |
string = "" | |
for character in map(chr, list): | |
string = string + character | |
return string | |
def f4(list): | |
string = "" | |
lchr = chr | |
for item in list: | |
string = string + lchr(item) | |
return string | |
def f5(list): | |
string = "" | |
for i in range(0, 256, 16): # 0, 16, 32, 48, 64, ... | |
s = "" | |
for character in map(chr, list[i:i+16]): | |
s = s + character | |
string = string + s | |
return string | |
import string | |
def f6(list): | |
return string.joinfields(map(chr, list), "") | |
import array | |
def f7(list): | |
return array.array('B', list).tostring() | |
def f8(list): | |
lchr = chr | |
return "".join(lchr(i) for i in list) | |
def f9(list): | |
lchr = chr | |
return "".join(map(lchr, list)) | |
if __name__ == '__main__': | |
import sys | |
try: times = int(sys.argv[1]) | |
except: times = 1000 | |
testdata = range(256) | |
testfuncs = f1, f2, f3, f4, f5, f6, f7, f8, f9 | |
for f in testfuncs: | |
t = timeit.Timer("%s(%s)"%(f.func_name,testdata), "from __main__ import %s"%f.func_name) | |
print f.func_name, t.timeit(times) | |
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$ python list2str_benchmark.py | |
f1 0.0816869735718 | |
f2 0.13659119606 | |
f3 0.0807240009308 | |
f4 0.0682158470154 | |
f5 0.103960990906 | |
f6 0.06405210495 | |
f7 0.0222752094269 | |
f8 0.0676648616791 | |
f9 0.065975189209 |
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